diff --git a/src/main/java/com/spring/modules/Tooling/service/impl/ProjectToolingApplyServiceImpl.java b/src/main/java/com/spring/modules/Tooling/service/impl/ProjectToolingApplyServiceImpl.java
index e9ff295b..63487458 100644
--- a/src/main/java/com/spring/modules/Tooling/service/impl/ProjectToolingApplyServiceImpl.java
+++ b/src/main/java/com/spring/modules/Tooling/service/impl/ProjectToolingApplyServiceImpl.java
@@ -328,6 +328,18 @@ public class ProjectToolingApplyServiceImpl implements ProjectToolingApplyServic
 
     @Override
     public void submitChange(ProjectToolApplyDaTa data) {
+        // 防并发重复提交：先查当前状态，只有"审批中"才允许继续
+        PlmProjectToolApplyHeaderData checkData = new PlmProjectToolApplyHeaderData();
+        checkData.setSite(data.getSite());
+        checkData.setApplyNo(data.getApplyNo());
+        PlmProjectToolApplyHeaderData current = projectToolingApplyMapper.checkToolApplyHeaderData(checkData);
+        if (current == null) {
+            throw new RuntimeException("未找到单据，applyNo: " + data.getApplyNo());
+        }
+        if (!"审批中".equals(current.getStatus())) {
+            throw new RuntimeException("单据状态已变更（当前状态：" + current.getStatus() + "），请刷新页面后重试！");
+        }
+
         // 保存修改信息
         projectToolingApplyMapper.updateApplyHeader(data);
         for (int i = 0; i < data.getDetailList().size() ; i++) {
diff --git a/src/main/java/com/spring/modules/proofing/service/impl/ProofingInformationServiceImpl.java b/src/main/java/com/spring/modules/proofing/service/impl/ProofingInformationServiceImpl.java
index 9cf96de3..849117fa 100644
--- a/src/main/java/com/spring/modules/proofing/service/impl/ProofingInformationServiceImpl.java
+++ b/src/main/java/com/spring/modules/proofing/service/impl/ProofingInformationServiceImpl.java
@@ -602,7 +602,23 @@ public class ProofingInformationServiceImpl extends ServiceImpl<ProofingInformat
     @Override
     @Transactional
     public void submitChange(ProofingInformationVo data) {
-        // 保存修改信息
+        // 防并发重复提交：先查当前状态，只有"审批中"才允许继续
+        ProofingInformationEntity current = baseMapper.selectOne(
+                new LambdaQueryWrapper<ProofingInformationEntity>()
+                        .eq(ProofingInformationEntity::getSite, data.getSite())
+                        .eq(ProofingInformationEntity::getProofingNo, data.getProofingNo())
+        );
+        if (current == null) {
+            throw new RuntimeException("未找到单据，proofingNo: " + data.getProofingNo());
+        }
+        if (!"审批中".equals(current.getProofingStatus())) {
+            throw new RuntimeException("单据状态已变更（当前状态：" + current.getProofingStatus() + "），请刷新页面后重试！");
+        }
+
+        // 保存修改信息：排除状态类字段，防止前端脏数据覆盖流程写入的状态
+        data.setProofingStatus(null);
+        data.setStepId(null);
+        data.setUpdateDate(null);
         lambdaUpdate().eq(ProofingInformationEntity::getSite, data.getSite()).eq(ProofingInformationEntity::getProofingNo, data.getProofingNo()).update(data);
         // 获取提交基础数据
         Map<String, String> baseData = changeManagementService.getSubmitBaseData(data.getSite(), data.getUserName(), data.getProofingNo());
diff --git a/src/main/java/com/spring/modules/quotation/service/impl/QuotationInformationServiceImpl.java b/src/main/java/com/spring/modules/quotation/service/impl/QuotationInformationServiceImpl.java
index df2b0dfc..1a6da02d 100644
--- a/src/main/java/com/spring/modules/quotation/service/impl/QuotationInformationServiceImpl.java
+++ b/src/main/java/com/spring/modules/quotation/service/impl/QuotationInformationServiceImpl.java
@@ -777,7 +777,23 @@ public class QuotationInformationServiceImpl extends ServiceImpl<QuotationInform
     @Override
     @Transactional
     public void submitChange(QuotationInformationVo data) {
-        // 更新单据
+        // 防并发重复提交：先查当前状态，只有"审批中"才允许继续
+        QuotationInformationEntity current = quotationInformationMapper.selectOne(
+                new QueryWrapper<QuotationInformationEntity>()
+                        .eq("site", data.getSite())
+                        .eq("quotation_batch_no", data.getQuotationBatchNo())
+        );
+        if (current == null) {
+            throw new RuntimeException("未找到单据，quotationBatchNo: " + data.getQuotationBatchNo());
+        }
+        if (!"审批中".equals(current.getQuotationStatus())) {
+            throw new RuntimeException("单据状态已变更（当前状态：" + current.getQuotationStatus() + "），请刷新页面后重试！");
+        }
+
+        // 更新单据：排除状态类字段，防止前端脏数据覆盖流程写入的状态
+        data.setQuotationStatus(null);
+        data.setStepId(null);
+        data.setUpdateDate(null);
         lambdaUpdate().eq(QuotationInformationEntity::getSite, data.getSite()).eq(QuotationInformationEntity::getQuotationBatchNo, data.getQuotationBatchNo()).update(data);
         // 获取提交基础数据
         Map<String, String> baseData = changeManagementService.getSubmitBaseData(data.getSite(), data.getUserName(), data.getQuotationBatchNo());
diff --git a/src/main/java/com/spring/modules/test/service/impl/TestInformationServiceImpl.java b/src/main/java/com/spring/modules/test/service/impl/TestInformationServiceImpl.java
index b3f60197..1e27ca82 100644
--- a/src/main/java/com/spring/modules/test/service/impl/TestInformationServiceImpl.java
+++ b/src/main/java/com/spring/modules/test/service/impl/TestInformationServiceImpl.java
@@ -348,7 +348,23 @@ public class TestInformationServiceImpl extends ServiceImpl<TestInformationMappe
     @Override
     @Transactional
     public void submitChange(TestInformationVo data) {
-        // 更新单据
+        // 防并发重复提交：先查当前状态，只有"审批中"才允许继续
+        TestInformationEntity current = testInformationMapper.selectOne(
+                new QueryWrapper<TestInformationEntity>()
+                        .eq("site", data.getSite())
+                        .eq("test_no", data.getTestNo())
+        );
+        if (current == null) {
+            throw new RuntimeException("未找到单据，test_no: " + data.getTestNo());
+        }
+        if (!"审批中".equals(current.getTestStatus())) {
+            throw new RuntimeException("单据状态已变更（当前状态：" + current.getTestStatus() + "），请刷新页面后重试！");
+        }
+
+        // 更新单据：排除状态类字段，防止前端脏数据覆盖流程写入的状态
+        data.setTestStatus(null);
+        data.setStepId(null);
+        data.setUpdateDate(null);
         lambdaUpdate().eq(TestInformationEntity::getSite, data.getSite()).eq(TestInformationEntity::getTestNo, data.getTestNo()).update(data);
         // 获取审批基础数据
         Map<String, String> baseData = changeManagementService.getSubmitBaseData(data.getSite(), data.getUserName(), data.getTestNo());