diff --git a/src/main/java/com/spring/modules/part/controller/CompleteWhereUsedController.java b/src/main/java/com/spring/modules/part/controller/CompleteWhereUsedController.java
new file mode 100644
index 00000000..e971afdf
--- /dev/null
+++ b/src/main/java/com/spring/modules/part/controller/CompleteWhereUsedController.java
@@ -0,0 +1,30 @@
+package com.spring.modules.part.controller;
+
+import com.spring.common.utils.PageUtils;
+import com.spring.common.utils.R;
+import com.spring.modules.part.dto.CompleteWhereUsedQueryDto;
+import com.spring.modules.part.service.CompleteWhereUsedService;
+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.ResponseBody;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * 完整反查：按子件或父件查询 BOM 组件引用关系
+ */
+@RestController
+@RequestMapping("plm/completeWhereUsed")
+public class CompleteWhereUsedController {
+
+    @Autowired
+    private CompleteWhereUsedService completeWhereUsedService;
+
+    @PostMapping("/search")
+    @ResponseBody
+    public R search(@RequestBody CompleteWhereUsedQueryDto query) {
+        PageUtils page = completeWhereUsedService.completeWhereUsedSearch(query);
+        return R.ok().put("page", page);
+    }
+}
diff --git a/src/main/java/com/spring/modules/part/dto/CompleteWhereUsedQueryDto.java b/src/main/java/com/spring/modules/part/dto/CompleteWhereUsedQueryDto.java
new file mode 100644
index 00000000..07649660
--- /dev/null
+++ b/src/main/java/com/spring/modules/part/dto/CompleteWhereUsedQueryDto.java
@@ -0,0 +1,23 @@
+package com.spring.modules.part.dto;
+
+import com.spring.common.utils.QueryPage;
+import lombok.Data;
+import lombok.EqualsAndHashCode;
+
+/**
+ * 查询条件：完整反查（子件在哪些父件 BOM 中被引用）
+ */
+@Data
+@EqualsAndHashCode(callSuper = true)
+public class CompleteWhereUsedQueryDto extends QueryPage {
+
+    private String site;
+    /** 子件物料编码 */
+    private String componentPart;
+    /** 子件描述 */
+    private String componentPartDesc;
+    /** 子件零件类型 */
+    private String componentPartType;
+    /** 子件零件状态 */
+    private String componentPartStatus;
+}
diff --git a/src/main/java/com/spring/modules/part/mapper/CompleteWhereUsedMapper.java b/src/main/java/com/spring/modules/part/mapper/CompleteWhereUsedMapper.java
new file mode 100644
index 00000000..3887e83a
--- /dev/null
+++ b/src/main/java/com/spring/modules/part/mapper/CompleteWhereUsedMapper.java
@@ -0,0 +1,16 @@
+package com.spring.modules.part.mapper;
+
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.spring.modules.part.dto.CompleteWhereUsedQueryDto;
+import com.spring.modules.part.vo.CompleteWhereUsedVo;
+import org.apache.ibatis.annotations.Mapper;
+import org.apache.ibatis.annotations.Param;
+
+@Mapper
+public interface CompleteWhereUsedMapper {
+
+    IPage<CompleteWhereUsedVo> completeWhereUsedSearch(
+            Page<CompleteWhereUsedVo> page,
+            @Param("query") CompleteWhereUsedQueryDto query);
+}
diff --git a/src/main/java/com/spring/modules/part/service/CompleteWhereUsedService.java b/src/main/java/com/spring/modules/part/service/CompleteWhereUsedService.java
new file mode 100644
index 00000000..bef386d4
--- /dev/null
+++ b/src/main/java/com/spring/modules/part/service/CompleteWhereUsedService.java
@@ -0,0 +1,9 @@
+package com.spring.modules.part.service;
+
+import com.spring.common.utils.PageUtils;
+import com.spring.modules.part.dto.CompleteWhereUsedQueryDto;
+
+public interface CompleteWhereUsedService {
+
+    PageUtils completeWhereUsedSearch(CompleteWhereUsedQueryDto query);
+}
diff --git a/src/main/java/com/spring/modules/part/service/impl/CompleteWhereUsedServiceImpl.java b/src/main/java/com/spring/modules/part/service/impl/CompleteWhereUsedServiceImpl.java
new file mode 100644
index 00000000..18e54e92
--- /dev/null
+++ b/src/main/java/com/spring/modules/part/service/impl/CompleteWhereUsedServiceImpl.java
@@ -0,0 +1,38 @@
+package com.spring.modules.part.service.impl;
+
+import com.baomidou.mybatisplus.core.metadata.IPage;
+import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
+import com.spring.common.utils.PageUtils;
+import com.spring.modules.part.dto.CompleteWhereUsedQueryDto;
+import com.spring.modules.part.mapper.CompleteWhereUsedMapper;
+import com.spring.modules.part.service.CompleteWhereUsedService;
+import com.spring.modules.part.vo.CompleteWhereUsedVo;
+import org.apache.commons.lang3.StringUtils;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+@Service
+public class CompleteWhereUsedServiceImpl implements CompleteWhereUsedService {
+
+    @Autowired
+    private CompleteWhereUsedMapper completeWhereUsedMapper;
+
+    @Override
+    public PageUtils completeWhereUsedSearch(CompleteWhereUsedQueryDto query) {
+        if (query == null || StringUtils.isBlank(query.getSite())) {
+            throw new RuntimeException("工厂(site)不能为空");
+        }
+        if (StringUtils.isAllBlank(query.getComponentPart(), query.getComponentPartDesc(), query.getComponentPartType(), query.getComponentPartStatus())) {
+            throw new RuntimeException("请至少填写一项查询条件");
+        }
+        if (StringUtils.isNotBlank(query.getComponentPart())) {
+            query.setComponentPart(query.getComponentPart().trim());
+        }
+        if (StringUtils.isNotBlank(query.getComponentPartDesc())) {
+            query.setComponentPartDesc(query.getComponentPartDesc().trim());
+        }
+        IPage<CompleteWhereUsedVo> page = completeWhereUsedMapper.completeWhereUsedSearch(
+                new Page<>(query.getPage(), query.getLimit()), query);
+        return new PageUtils(page);
+    }
+}
diff --git a/src/main/java/com/spring/modules/part/vo/CompleteWhereUsedVo.java b/src/main/java/com/spring/modules/part/vo/CompleteWhereUsedVo.java
new file mode 100644
index 00000000..85ed1322
--- /dev/null
+++ b/src/main/java/com/spring/modules/part/vo/CompleteWhereUsedVo.java
@@ -0,0 +1,43 @@
+package com.spring.modules.part.vo;
+
+import lombok.Data;
+
+import java.math.BigDecimal;
+import java.util.Date;
+
+/**
+ * 完整反查结果行，字段顺序与查询 SQL 列顺序一致。
+ */
+@Data
+public class CompleteWhereUsedVo {
+
+    private String site;
+    private String parentPartNo;
+    private String parentPartDesc;
+    private String parentPartType;
+    private String parentPartStatus;
+    private String parentPartStatusDesc;
+    private Integer engChgLevel;
+    private String alternativeNo;
+    /** plm_bom_detail.status */
+    private String bomDetailStatus;
+    private Integer lineItemNo;
+    private Integer lineSequence;
+    private String componentPart;
+    private String componentPartDesc;
+    private String componentPartType;
+    private String issueType;
+    private String componentPartStatus;
+    private String componentPartStatusDesc;
+    private String bomType;
+    private Date effPhaseInDate;
+    private Date effPhaseOutDate;
+    private BigDecimal qtyPerAssembly;
+    private BigDecimal componentScrap;
+    private BigDecimal shrinkageFactor;
+    private Integer operationNo;
+    private String issueToLoc;
+    private String noteText;
+    private String consumptionItem;
+    private String printUnit;
+}
diff --git a/src/main/resources/mapper/part/CompleteWhereUsedMapper.xml b/src/main/resources/mapper/part/CompleteWhereUsedMapper.xml
new file mode 100644
index 00000000..d8e54a87
--- /dev/null
+++ b/src/main/resources/mapper/part/CompleteWhereUsedMapper.xml
@@ -0,0 +1,67 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
+<mapper namespace="com.spring.modules.part.mapper.CompleteWhereUsedMapper">
+
+    <select id="completeWhereUsedSearch"
+            parameterType="com.spring.modules.part.dto.CompleteWhereUsedQueryDto"
+            resultType="com.spring.modules.part.vo.CompleteWhereUsedVo">
+        SELECT
+            pbc.site,
+            pbc.part_no AS parentPartNo,
+            p1.part_desc AS parentPartDesc,
+            p1.part_type AS parentPartType,
+            p1.part_status AS parentPartStatus,
+            dbo.get_part_status_name(p1.site, p1.part_status) AS parentPartStatusDesc,
+            pbc.eng_chg_level AS engChgLevel,
+            pbc.alternative_no AS alternativeNo,
+            pbd.status AS bomDetailStatus,
+            pbc.line_item_no AS lineItemNo,
+            pbc.line_sequence AS lineSequence,
+            pbc.component_part AS componentPart,
+            dbo.get_part_name(pbc.site, pbc.component_part) AS componentPartDesc,
+            p2.part_type AS componentPartType,
+            pbc.issue_type AS issueType,
+            p2.part_status AS componentPartStatus,
+            dbo.get_part_status_name(p2.site, p2.part_status) AS componentPartStatusDesc,
+            pbc.bom_type AS bomType,
+            pbh.EFF_PHASE_IN_DATE AS effPhaseInDate,
+            pbh.EFF_PHASE_OUT_DATE AS effPhaseOutDate,
+            pbc.qty_per_assembly AS qtyPerAssembly,
+            pbc.component_scrap AS componentScrap,
+            pbc.shrinkage_factor AS shrinkageFactor,
+            pbc.operation_no AS operationNo,
+            pbc.issue_to_loc AS issueToLoc,
+            pbc.note_text AS noteText,
+            pbc.consumption_item AS consumptionItem,
+            pbc.print_unit AS printUnit
+        FROM plm_bom_component AS pbc
+        LEFT JOIN part AS p1 ON pbc.site = p1.site AND pbc.part_no = p1.part_no
+        LEFT JOIN part AS p2 ON pbc.site = p2.site AND pbc.component_part = p2.part_no
+        LEFT JOIN plm_bom_detail AS pbd ON pbc.site = pbd.site AND pbc.part_no = pbd.part_no
+            AND pbc.eng_chg_level = pbd.eng_chg_level AND pbc.bom_type = pbd.bom_type
+            AND pbc.alternative_no = pbd.alternative_no
+        LEFT JOIN plm_bom_header AS pbh ON pbc.site = pbh.site AND pbc.part_no = pbh.part_no
+            AND pbc.eng_chg_level = pbh.eng_chg_level AND pbc.bom_type = pbh.bom_type
+        <where>
+            pbc.site = #{query.site}
+            <if test="query.componentPart != null and query.componentPart != ''">
+                AND pbc.component_part = #{query.componentPart}
+            </if>
+            <if test="query.componentPartDesc != null and query.componentPartDesc != ''">
+                AND dbo.get_part_name(pbc.site, pbc.component_part) LIKE #{query.componentPartDesc}
+            </if>
+            <if test="query.componentPartType != null and query.componentPartType != ''">
+                AND p2.part_type = #{query.componentPartType}
+            </if>
+            <if test="query.componentPartStatus != null and query.componentPartStatus != ''">
+                AND p2.part_status = #{query.componentPartStatus}
+            </if>
+        </where>
+        ORDER BY
+            pbc.part_no,
+            pbc.site,
+            pbc.eng_chg_level,
+            pbc.bom_type,
+            pbc.alternative_no
+    </select>
+</mapper>