diff --git a/src/main/java/com/xujie/sys/modules/pms/controller/QcReportController.java b/src/main/java/com/xujie/sys/modules/pms/controller/QcReportController.java
index 80bfbc3..2a2d7f3 100644
--- a/src/main/java/com/xujie/sys/modules/pms/controller/QcReportController.java
+++ b/src/main/java/com/xujie/sys/modules/pms/controller/QcReportController.java
@@ -6,10 +6,7 @@ import com.xujie.sys.modules.pms.data.QcMethodData;
 import com.xujie.sys.modules.pms.data.QcReportData;
 import com.xujie.sys.modules.pms.service.QcReportService;
 import org.springframework.beans.factory.annotation.Autowired;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestBody;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.bind.annotation.*;
 
 import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
diff --git a/src/main/java/com/xujie/sys/modules/pms/mapper/QcReportMapper.java b/src/main/java/com/xujie/sys/modules/pms/mapper/QcReportMapper.java
index ac4781c..322a31b 100644
--- a/src/main/java/com/xujie/sys/modules/pms/mapper/QcReportMapper.java
+++ b/src/main/java/com/xujie/sys/modules/pms/mapper/QcReportMapper.java
@@ -36,4 +36,10 @@ public interface QcReportMapper {
     IPage<QcReportData> getOQCReportCount(Page<QcReportData> qcReportDataPage, @Param("query") QcReportData data);
 
     List<QcReportFQASData> downloadOQCRecord(QcReportData data);
+
+    // 优化方法：使用OFFSET分页，避免PageHelper开销
+    List<QcReportIPQCData> downloadIPQCRecordWithOffset(Page<QcReportData> qcReportDataPage,@Param("query")QcReportData data);
+
+    // 优化方法：仅查询总数，不返回具体数据
+    int getIPQCReportCountOptimized(@Param("query") QcReportData data);
 }
diff --git a/src/main/java/com/xujie/sys/modules/pms/service/Impl/QcReportServiceImpl.java b/src/main/java/com/xujie/sys/modules/pms/service/Impl/QcReportServiceImpl.java
index c25ef93..9ec02fe 100644
--- a/src/main/java/com/xujie/sys/modules/pms/service/Impl/QcReportServiceImpl.java
+++ b/src/main/java/com/xujie/sys/modules/pms/service/Impl/QcReportServiceImpl.java
@@ -20,10 +20,7 @@ import javax.servlet.http.HttpServletResponse;
 import java.io.IOException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.Map;
+import java.util.*;
 import java.util.concurrent.*;
 
 @Service
@@ -124,59 +121,108 @@ public class QcReportServiceImpl implements QcReportService {
     @Override
     public void downloadQcRecordMillion(HttpServletResponse response, QcReportData data) throws Exception {
         ServletOutputStream out = null;
+        ExcelWriter writer = null;
+        ExecutorService executor = null;
+
         try {
+            // 1. 提前设置响应头（必须在获取输出流前！）
+            String fileName = URLEncoder.encode("QC报表", "UTF-8");
+            response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
+            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
+            response.setCharacterEncoding("utf-8");
+
+            // 2. 获取输出流
             out = response.getOutputStream();
 
-            // 设置EXCEL名称
-            String fileName = URLEncoder.encode("QC报表", "UTF-8");
+            // 3. 校验下载类型
+            if (!"ipqc".equals(data.getDownloadType())) {
+                throw new IllegalArgumentException("不支持的下载类型: " + data.getDownloadType());
+            }
 
-            // 设置SHEET名称
-            WriteSheet sheet = new WriteSheet();
-            sheet.setSheetName("明细列表sheet1");
+            // 4. 查询总数
+            int totalRowCount = this.qcReportMapper.getIPQCReportCountOptimized(data);
+            if (totalRowCount <= 0) {
+                // 处理空数据：写入空Excel（避免客户端收到损坏文件）
+                writer = EasyExcel.write(out, QcReportIPQCData.class).autoCloseStream(false).build();
+                WriteSheet sheet = EasyExcel.writerSheet("检验单明细").build();
+                writer.write(Collections.emptyList(), sheet);
+                writer.finish();
+                out.flush();
+                return;
+            }
 
-            int totalRowCount = 0;
-            // 查询总数并封装相关变量
-            if ("ipqc".equals(data.getDownloadType())) {
-                IPage<QcReportData> list = this.qcReportMapper.getIPQCReportCount(new Page<QcReportData>(data.getPage(), data.getLimit()), data);
-                totalRowCount = (int)list.getTotal();
-                int pageSize = ExcelConstant.PER_WRITE_ROW_COUNT;
-                int writeCount = totalRowCount % pageSize == 0 ? (totalRowCount / pageSize) : (totalRowCount / pageSize + 1);
-                // 1. 循环外创建线程池
-                ExecutorService executor = Executors.newFixedThreadPool(Math.min(writeCount, 10));
-                List<FutureTask<List<QcReportIPQCData>>> futureTaskList = new ArrayList<>();
-
-                for (int i = 0; i < writeCount; i++) {
-                    int pageNum = i + 1; // 子线程中使用的页码
-                    FutureTask<List<QcReportIPQCData>> futureTask = new FutureTask<>(() -> {
-                          PageHelper.startPage(pageNum, pageSize);
-                        return this.qcReportMapper.downloadIPQCRecord(data);
-                    });
-
-                    executor.execute(futureTask);
-                    futureTaskList.add(futureTask);
-                }
+            // 5. 分页参数
+            int pageSize = ExcelConstant.PER_WRITE_ROW_COUNT;
+            int writeCount = (totalRowCount + pageSize - 1) / pageSize; // 优化分页计算
 
-                executor.shutdown();
-                executor.awaitTermination(1, TimeUnit.HOURS);
+            // 6. 线程池（明确配置，避免资源泄漏）
+            executor = new ThreadPoolExecutor(
+                    Math.min(10, Runtime.getRuntime().availableProcessors() + 1),
+                    10,
+                    0L, TimeUnit.MILLISECONDS,
+                    new LinkedBlockingQueue<>(100),
+                    new ThreadPoolExecutor.CallerRunsPolicy()
+            );
 
-                ExcelWriter writer = EasyExcel.write(out, QcReportIPQCData.class).build();
-                sheet = EasyExcel.writerSheet("检验单明细").build();
-                for (FutureTask<List<QcReportIPQCData>> task : futureTaskList) {
-                    List<QcReportIPQCData> dataList = task.get(); // 获取单批数据
-                    writer.write(dataList, sheet); // 分批写入
-                }
-                writer.finish();
+            List<Future<List<QcReportIPQCData>>> futureList = new ArrayList<>();
+            for (int i = 0; i < writeCount; i++) {
+                int pageNum = i + 1;
+                futureList.add(executor.submit(() ->
+                        this.qcReportMapper.downloadIPQCRecordWithOffset(new Page<>(pageNum, pageSize), data)
+                ));
+            }
 
+            // 7. 关闭线程池并等待
+            executor.shutdown();
+            if (!executor.awaitTermination(1, TimeUnit.HOURS)) {
+                executor.shutdownNow(); // 超时强制关闭
             }
 
-            // 下载EXCEL
-            response.setHeader("Content-Disposition", "attachment;filename=" + fileName + ".xlsx");
-            response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
-            response.setCharacterEncoding("utf-8");
+            // 8. 写入Excel（禁用自动关闭流）
+            writer = EasyExcel.write(out, QcReportIPQCData.class)
+                    .autoCloseStream(false) // 手动控制流关闭
+                    .build();
+            WriteSheet sheet = EasyExcel.writerSheet("检验单明细").build();
+
+            // 9. 处理子线程结果（捕获异常）
+            for (Future<List<QcReportIPQCData>> future : futureList) {
+                try {
+                    List<QcReportIPQCData> dataList = future.get(30, TimeUnit.SECONDS); // 单个任务超时
+                    if (dataList != null) {
+                        writer.write(dataList, sheet);
+                    }
+                } catch (ExecutionException e) {
+                    // 子线程异常（如SQL错误）
+                    throw new RuntimeException("分页查询失败: " + e.getCause().getMessage(), e.getCause());
+                } catch (TimeoutException e) {
+                    throw new RuntimeException("分页查询超时", e);
+                }
+            }
+
+            writer.finish();
             out.flush();
+
+        } catch (Exception e) {
+            // 增强异常信息，便于排查
+            throw new RuntimeException("下载QC报表失败: " + e.getMessage(), e);
         } finally {
+            // 10. 按顺序关闭资源（先关闭writer，再关闭流）
+            if (writer != null) {
+                try {
+                    writer.finish(); // 确保最后关闭writer
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
             if (out != null) {
-                out.close();
+                try {
+                    out.close();
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+            }
+            if (executor != null && !executor.isTerminated()) {
+                executor.shutdownNow();
             }
         }
     }
diff --git a/src/main/resources/mapper/pms/QcReportMapper.xml b/src/main/resources/mapper/pms/QcReportMapper.xml
index fb2ddc9..b28aae5 100644
--- a/src/main/resources/mapper/pms/QcReportMapper.xml
+++ b/src/main/resources/mapper/pms/QcReportMapper.xml
@@ -1347,4 +1347,189 @@
         END, a.create_date desc
     </select>
 
+    <!-- 优化版本：使用OFFSET分页的IPQC导出查询 -->
+    <select id="downloadIPQCRecordWithOffset" parameterType="com.xujie.sys.modules.pms.data.QcReportData" resultType="com.xujie.sys.modules.pms.data.QcReportIPQCData">
+        SELECT
+        a.inspection_no,
+        a.site,
+        a.bu_no,
+        dbo.get_bu_desc(a.site, a.bu_no) as buDesc,
+        a.state,
+        a.inspection_result,
+        a.task_date,
+        a.inspection_type_no,
+        a.inspection_cycle,
+        a.order_no,
+        a.operation_desc,
+        a.resource_id,
+        r.resourceDesc,
+        a.part_no,
+        d.PartDescription as part_desc,
+        d.spec,
+        a.inspection_remark,
+        a.roll_qty,
+        a.sampling_qty,
+        a.disposal_measures,
+        a.disposal_remark,
+        a.inspector_date,
+        a.seq_no,
+        a.batch_roll_no,
+        a.special_requirements,
+        a.work_center_no,
+        wc.WorkCenterDesc as workCenterDesc,
+        a.roll_no,
+        a.um_id,
+        um.UMName as umName,
+        a.action_date,
+        a.action_by,
+        a.pass_qty,
+        a.not_pass_qty,
+        b.item_no,
+        b.item_desc,
+        b.default_value,
+        b.max_value,
+        b.min_value,
+        b.sampling_qty as itemSamplingQty,
+        b.unqualified_quantity,
+        b.item_result,
+        CASE WHEN b.item_result = 'Y' THEN '合格'
+        WHEN b.item_result = 'N' THEN '不合格'
+        END as itemResultDesc,
+        CASE WHEN b.value_type_db = 'T' THEN b.text_value
+        WHEN b.value_type_db = 'N' THEN CONVERT(varchar, b.number_value, 126)
+        END as textValue,
+        isnull(dbo.joint_name (a.site, a.bu_no, a.inspection_no, 'coordination'), '') AS operatorName,
+        isnull(dbo.joint_id (a.site, a.bu_no, a.inspection_no, 'supplier'), '') AS responsiblePerson
+        FROM qc_ipqc_record as a
+        LEFT JOIN qc_ipqc_detailed_record b ON a.site = b.site AND a.bu_no = b.bu_no AND a.inspection_no = b.inspection_no
+        left join WorkCenterResource as r on a.site = r.site and a.resource_id = r.resourceID
+        left join part as d on a.site = d.site and a.part_no = d.PartNo
+        left join UM as um on a.site = um.site and a.um_id = um.UMID
+        left join WorkCenter as wc on a.site = wc.site and a.work_center_no = wc.WorkCenterNo
+        <where>
+            a.site in (select site from eam_access_site where username = #{query.userName})
+            and (a.site + '-' + a.bu_no) in (select * from dbo.query_bu(#{query.userName}))
+            <if test="query.buDesc != null and query.buDesc != ''">
+                AND dbo.get_bu_desc (a.site, a.bu_no) = #{query.buDesc}
+            </if>
+            <if test = "query.inspectionNo != null and query.inspectionNo != ''">
+                AND a.inspection_no LIKE #{query.inspectionNo}
+            </if>
+            <if test = "query.partNo != null and query.partNo != ''">
+                AND a.part_no LIKE #{query.partNo}
+            </if>
+            <if test = "query.partDesc != null and query.partDesc != ''">
+                AND d.PartDescription LIKE #{query.partDesc}
+            </if>
+            <if test = "query.states != null and query.states.size > 0">
+                AND a.state in
+                <foreach item="item" collection="query.states"  open="(" separator="," close=")">
+                    #{item}
+                </foreach>
+            </if>
+            <if test = "query.inspectionTypeNo != null and query.inspectionTypeNo != ''">
+                AND a.inspection_type_no = #{query.inspectionTypeNo}
+            </if>
+            <if test = "query.inspectionResult != null and query.inspectionResult != ''">
+                AND a.inspection_result = #{query.inspectionResult}
+            </if>
+            <if test = "query.disposalMeasures != null and query.disposalMeasures != ''">
+                AND a.disposal_measures = #{query.disposalMeasures}
+            </if>
+            <if test = "query.orderNo != null and query.orderNo != ''">
+                AND a.order_no LIKE #{query.orderNo}
+            </if>
+            <if test = "query.seqNo != null and query.seqNo != ''">
+                AND a.seq_no LIKE #{query.seqNo}
+            </if>
+            <if test = "query.operationDesc != null and query.operationDesc != ''">
+                AND a.operation_desc LIKE #{query.operationDesc}
+            </if>
+            <if test="query.startDate != null">
+                AND a.inspector_date >= #{query.startDate}
+            </if>
+            <if test="query.endDate != null">
+                AND #{query.endDate} >= a.inspector_date
+            </if>
+            <if test="query.startDate2 != null">
+                AND a.task_date >= #{query.startDate2}
+            </if>
+            <if test="query.endDate2 != null">
+                AND #{query.endDate2} >= a.task_date
+            </if>
+            <if test = "query.itemResult != null and query.itemResult != ''">
+                AND b.item_result = #{query.itemResult}
+            </if>
+        </where>
+        ORDER BY
+        CASE WHEN a.state = '待检验' THEN 1
+        WHEN a.state = '待审核' THEN 2
+        WHEN a.state = '已完成' THEN 3
+        END, a.task_date desc
+    </select>
+
+    <!-- 优化版本：仅查询总数的IPQC统计查询 -->
+    <select id="getIPQCReportCountOptimized" parameterType="com.xujie.sys.modules.pms.data.QcReportData" resultType="int">
+        SELECT
+        count(1)
+        from qc_ipqc_detailed_record as b
+        Left JOIN qc_ipqc_record as a ON a.site = b.site AND a.bu_no = b.bu_no AND a.inspection_no = b.inspection_no
+        left join part as d on a.site = d.site and a.part_no = d.PartNo
+        <where>
+            a.site in (select site from eam_access_site where username = #{query.userName})
+            and (a.site + '-' + a.bu_no) in (select * from dbo.query_bu(#{query.userName}))
+            <if test="query.buDesc != null and query.buDesc != ''">
+                AND dbo.get_bu_desc (a.site, a.bu_no) = #{query.buDesc}
+            </if>
+            <if test = "query.inspectionNo != null and query.inspectionNo != ''">
+                AND a.inspection_no LIKE #{query.inspectionNo}
+            </if>
+            <if test = "query.partNo != null and query.partNo != ''">
+                AND a.part_no LIKE #{query.partNo}
+            </if>
+            <if test = "query.partDesc != null and query.partDesc != ''">
+                AND d.PartDescription LIKE #{query.partDesc}
+            </if>
+            <if test = "query.states != null and query.states.size > 0">
+                AND a.state in
+                <foreach item="item" collection="query.states"  open="(" separator="," close=")">
+                    #{item}
+                </foreach>
+            </if>
+            <if test = "query.inspectionTypeNo != null and query.inspectionTypeNo != ''">
+                AND a.inspection_type_no = #{query.inspectionTypeNo}
+            </if>
+            <if test = "query.inspectionResult != null and query.inspectionResult != ''">
+                AND a.inspection_result = #{query.inspectionResult}
+            </if>
+            <if test = "query.disposalMeasures != null and query.disposalMeasures != ''">
+                AND a.disposal_measures = #{query.disposalMeasures}
+            </if>
+            <if test = "query.orderNo != null and query.orderNo != ''">
+                AND a.order_no LIKE #{query.orderNo}
+            </if>
+            <if test = "query.seqNo != null and query.seqNo != ''">
+                AND a.seq_no LIKE #{query.seqNo}
+            </if>
+            <if test = "query.operationDesc != null and query.operationDesc != ''">
+                AND a.operation_desc LIKE #{query.operationDesc}
+            </if>
+            <if test="query.startDate != null">
+                AND a.inspector_date >= #{query.startDate}
+            </if>
+            <if test="query.endDate != null">
+                AND #{query.endDate} >= a.inspector_date
+            </if>
+            <if test="query.startDate2 != null">
+                AND a.task_date >= #{query.startDate2}
+            </if>
+            <if test="query.endDate2 != null">
+                AND #{query.endDate2} >= a.task_date
+            </if>
+            <if test = "query.itemResult != null and query.itemResult != ''">
+                AND b.item_result = #{query.itemResult}
+            </if>
+        </where>
+    </select>
+
 </mapper>