diff --git a/nflg-qms-admin/src/main/java/com/nflg/qms/admin/service/QmsQcMaterialControllerService.java b/nflg-qms-admin/src/main/java/com/nflg/qms/admin/service/QmsQcMaterialControllerService.java
index 18052a20..6afc5152 100644
--- a/nflg-qms-admin/src/main/java/com/nflg/qms/admin/service/QmsQcMaterialControllerService.java
+++ b/nflg-qms-admin/src/main/java/com/nflg/qms/admin/service/QmsQcMaterialControllerService.java
@@ -78,6 +78,11 @@ public class QmsQcMaterialControllerService {
      * 分页查询质检物料
      */
     public PageData<QmsQcMaterialVO> search(QmsQcMaterialSearchQO request) {
+        // 若传入了物料类别编码，展开为包含当前类别及所有子孙类别的编码列表
+        if (StrUtil.isNotBlank(request.getMaterialCategoryCode())) {
+            request.setMaterialCategoryCodes(expandCategoryCodes(request.getMaterialCategoryCode()));
+        }
+
         IPage<QmsQcMaterialVO> page = qcMaterialMapper.searchPage(
                 request, new Page<>(request.getPage(), request.getPageSize()));
 
@@ -89,6 +94,40 @@ public class QmsQcMaterialControllerService {
         return result;
     }
 
+    /**
+     * 展开物料类别编码：查询指定编码对应的类别及其所有子孙类别的编码列表（一次查询，无递归）
+     * <p>
+     * parentTree 存储完整祖先路径（ltree 格式，如 0.A.B.C），子孙节点满足：
+     * parentTree = fullPath  OR  parentTree LIKE 'fullPath.%'
+     * </p>
+     */
+    private List<String> expandCategoryCodes(String categoryCode) {
+        QmsQcMaterialCategory category = qcMaterialCategoryService.lambdaQuery()
+                .eq(QmsQcMaterialCategory::getCategoryCode, categoryCode)
+                .one();
+        if (category == null) {
+            // 类别不存在，原样返回，Mapper 中 IN 条件查不到数据
+            return List.of(categoryCode);
+        }
+
+        // 构建当前节点完整路径：parentTree.id（若 parentTree 为空则直接取 id）
+        String fullPath = StrUtil.isBlank(category.getParentTree())
+                ? String.valueOf(category.getId())
+                : category.getParentTree() + "." + category.getId();
+
+        // 一次查询：自身 + 直接子节点（parentTree=fullPath）+ 孙级及更深（parentTree LIKE 'fullPath.%'）
+        return qcMaterialCategoryService.lambdaQuery()
+                .eq(QmsQcMaterialCategory::getCategoryCode, categoryCode)
+                .or().eq(QmsQcMaterialCategory::getParentTree, fullPath)
+                .or().likeRight(QmsQcMaterialCategory::getParentTree, fullPath + ".")
+                .list()
+                .stream()
+                .map(QmsQcMaterialCategory::getCategoryCode)
+                .filter(Objects::nonNull)
+                .distinct()
+                .collect(Collectors.toList());
+    }
+
     /**
      * 新增质检物料
      */
@@ -375,6 +414,10 @@ public class QmsQcMaterialControllerService {
      * 导出质检物料（不分页）
      */
     public void exportSearch(HttpServletResponse response, QmsQcMaterialSearchQO request) throws IOException {
+        // 导出同样支持子孙类别展开
+        if (StrUtil.isNotBlank(request.getMaterialCategoryCode())) {
+            request.setMaterialCategoryCodes(expandCategoryCodes(request.getMaterialCategoryCode()));
+        }
         EecExcelUtil.export("质检物料", "质检物料", qcMaterialMapper.searchAll(request), response);
     }
 
diff --git a/nflg-wms-common/src/main/java/com/nflg/wms/common/pojo/qo/QmsQcMaterialSearchQO.java b/nflg-wms-common/src/main/java/com/nflg/wms/common/pojo/qo/QmsQcMaterialSearchQO.java
index 687f14c6..17890f57 100644
--- a/nflg-wms-common/src/main/java/com/nflg/wms/common/pojo/qo/QmsQcMaterialSearchQO.java
+++ b/nflg-wms-common/src/main/java/com/nflg/wms/common/pojo/qo/QmsQcMaterialSearchQO.java
@@ -2,6 +2,8 @@ package com.nflg.wms.common.pojo.qo;
 
 import lombok.Data;
 
+import java.util.List;
+
 /**
  * 查询质检物料列表 请求参数（分页）
  */
@@ -13,6 +15,11 @@ public class QmsQcMaterialSearchQO extends PageQO {
      */
     private String materialCategoryCode;
 
+    /**
+     * 物料类别编码列表（内部使用，由 Service 层自动填充，包含当前类别及其所有子孙类别编码）
+     */
+    private List<String> materialCategoryCodes;
+
     /**
      * 物料编号（模糊匹配）
      */
diff --git a/nflg-wms-repository/src/main/resources/mapper/QmsQcMaterialMapper.xml b/nflg-wms-repository/src/main/resources/mapper/QmsQcMaterialMapper.xml
index 1606bff3..148b6fa0 100644
--- a/nflg-wms-repository/src/main/resources/mapper/QmsQcMaterialMapper.xml
+++ b/nflg-wms-repository/src/main/resources/mapper/QmsQcMaterialMapper.xml
@@ -27,9 +27,17 @@
             update_time
         FROM qms_qc_material
         <where>
-            <if test="request.materialCategoryCode != null and request.materialCategoryCode != ''">
-                AND material_category_code = #{request.materialCategoryCode}
-            </if>
+            <choose>
+                <when test="request.materialCategoryCodes != null and !request.materialCategoryCodes.isEmpty()">
+                    AND material_category_code IN
+                    <foreach collection="request.materialCategoryCodes" item="code" open="(" separator="," close=")">
+                        #{code}
+                    </foreach>
+                </when>
+                <when test="request.materialCategoryCode != null and request.materialCategoryCode != ''">
+                    AND material_category_code = #{request.materialCategoryCode}
+                </when>
+            </choose>
             <if test="request.materialNo != null and request.materialNo != ''">
                 AND material_no ilike concat('%', #{request.materialNo}, '%')
             </if>
@@ -40,7 +48,7 @@
                 AND material_name ilike concat('%', #{request.materialName}, '%')
             </if>
         </where>
-        ORDER BY id DESC
+        ORDER BY material_no DESC
     </select>
 
     <!--
@@ -65,9 +73,17 @@
             TO_CHAR(create_time, 'YYYY-MM-DD HH24:MI:SS') AS create_time
         FROM qms_qc_material
         <where>
-            <if test="request.materialCategoryCode != null and request.materialCategoryCode != ''">
-                AND material_category_code = #{request.materialCategoryCode}
-            </if>
+            <choose>
+                <when test="request.materialCategoryCodes != null and !request.materialCategoryCodes.isEmpty()">
+                    AND material_category_code IN
+                    <foreach collection="request.materialCategoryCodes" item="code" open="(" separator="," close=")">
+                        #{code}
+                    </foreach>
+                </when>
+                <when test="request.materialCategoryCode != null and request.materialCategoryCode != ''">
+                    AND material_category_code = #{request.materialCategoryCode}
+                </when>
+            </choose>
             <if test="request.materialNo != null and request.materialNo != ''">
                 AND material_no ilike concat('%', #{request.materialNo}, '%')
             </if>