diff --git a/backend/src/main/java/com/designhub/controller/TaskItemController.java b/backend/src/main/java/com/designhub/controller/TaskItemController.java
index 48b6775..21e7ac0 100644
--- a/backend/src/main/java/com/designhub/controller/TaskItemController.java
+++ b/backend/src/main/java/com/designhub/controller/TaskItemController.java
@@ -53,9 +53,10 @@ public class TaskItemController {
             @Parameter(description = "页码") @RequestParam(defaultValue = "1") Integer page,
             @Parameter(description = "每页数量") @RequestParam(defaultValue = "10") Integer pageSize,
             @Parameter(description = "任务类型ID") @RequestParam(required = false) Long taskTypeId,
-            @Parameter(description = "搜索关键词") @RequestParam(required = false) String keyword) {
+            @Parameter(description = "搜索关键词") @RequestParam(required = false) String keyword,
+            @Parameter(description = "筛选可接单部门ID") @RequestParam(required = false) Long filterDeptId) {
         
-        IPage<TaskItem> items = taskItemService.getAvailableItems(page, pageSize, taskTypeId, keyword);
+        IPage<TaskItem> items = taskItemService.getAvailableItems(page, pageSize, taskTypeId, keyword, filterDeptId);
         return Result.success(items);
     }
 
diff --git a/backend/src/main/java/com/designhub/mapper/TaskItemMapper.java b/backend/src/main/java/com/designhub/mapper/TaskItemMapper.java
index 4cd78af..5a3e80e 100644
--- a/backend/src/main/java/com/designhub/mapper/TaskItemMapper.java
+++ b/backend/src/main/java/com/designhub/mapper/TaskItemMapper.java
@@ -60,6 +60,55 @@ public interface TaskItemMapper extends BaseMapper<TaskItem> {
                                           @Param("taskTypeId") Long taskTypeId,
                                           @Param("keyword") String keyword);
 
+    /**
+     * 查询可接单的子任务列表（按任务类型ID列表筛选，用于接单部门筛选功能）
+     */
+    @Select("<script>" +
+            "SELECT ti.*, " +
+            "  t.title AS mainTaskTitle, " +
+            "  t.pipeline_mode AS pipelineMode, " +
+            "  t.brand_id, " +
+            "  t.category_id, " +
+            "  t.platform_id, " +
+            "  t.spu_info AS spuInfo, " +
+            "  t.task_sub_type AS taskSubType, " +
+            "  t.attachment_url AS attachmentUrl, " +
+            "  t.preview_image AS previewImage, " +
+            "  u.real_name AS publisherName, " +
+            "  b.brand_name AS brandName, " +
+            "  c.category_name AS categoryName, " +
+            "  p.platform_name AS platformName, " +
+            "  dt.type_name AS taskTypeName, " +
+            "  (SELECT COUNT(*) FROM task_item WHERE task_id = ti.task_id) AS totalItems " +
+            "FROM task_item ti " +
+            "LEFT JOIN task t ON ti.task_id = t.id " +
+            "LEFT JOIN sys_user u ON t.publisher_id = u.id " +
+            "LEFT JOIN brand b ON t.brand_id = b.id " +
+            "LEFT JOIN category c ON t.category_id = c.id " +
+            "LEFT JOIN platform p ON t.platform_id = p.id " +
+            "LEFT JOIN task_type dt ON ti.task_type_id = dt.id " +
+            "WHERE ti.status = 'pending' AND ti.is_locked = 0 AND t.deleted = 0 AND t.approval_status = 'approved' " +
+            "<if test='taskTypeId != null'> AND ti.task_type_id = #{taskTypeId}</if> " +
+            "<if test='keyword != null and keyword != \"\"'> " +
+            "  AND (t.title LIKE CONCAT('%', #{keyword}, '%') " +
+            "    OR t.task_no LIKE CONCAT('%', #{keyword}, '%') " +
+            "    OR ti.item_no LIKE CONCAT('%', #{keyword}, '%') " +
+            "    OR t.spu_info LIKE CONCAT('%', #{keyword}, '%') " +
+            "    OR u.real_name LIKE CONCAT('%', #{keyword}, '%'))" +
+            "</if> " +
+            "<if test='allowedTaskTypeIds != null and allowedTaskTypeIds.size() > 0'> " +
+            "  AND ti.task_type_id IN " +
+            "  <foreach collection='allowedTaskTypeIds' item='typeId' open='(' separator=',' close=')'>" +
+            "    #{typeId}" +
+            "  </foreach> " +
+            "</if> " +
+            "ORDER BY ti.create_time DESC" +
+            "</script>")
+    IPage<TaskItem> selectAvailableItemsByTaskTypes(Page<TaskItem> page,
+                                                     @Param("taskTypeId") Long taskTypeId,
+                                                     @Param("keyword") String keyword,
+                                                     @Param("allowedTaskTypeIds") List<Long> allowedTaskTypeIds);
+
     /**
      * 查询进行中的子任务列表
      * @param receiverId 接单人ID，null表示不按接单人过滤
diff --git a/backend/src/main/java/com/designhub/service/TaskItemService.java b/backend/src/main/java/com/designhub/service/TaskItemService.java
index 9b539f5..c53b2b7 100644
--- a/backend/src/main/java/com/designhub/service/TaskItemService.java
+++ b/backend/src/main/java/com/designhub/service/TaskItemService.java
@@ -50,8 +50,57 @@ public class TaskItemService {
      * 获取可接单的子任务列表
      */
     public IPage<TaskItem> getAvailableItems(Integer page, Integer pageSize, Long taskTypeId, String keyword) {
+        return getAvailableItems(page, pageSize, taskTypeId, keyword, null);
+    }
+    
+    /**
+     * 获取可接单的子任务列表（支持按接单部门筛选）
+     * @param filterDeptId 筛选可接单部门ID（可选）
+     */
+    public IPage<TaskItem> getAvailableItems(Integer page, Integer pageSize, Long taskTypeId, String keyword, Long filterDeptId) {
         Page<TaskItem> pageParam = new Page<>(page, pageSize);
-        return taskItemMapper.selectAvailableItems(pageParam, taskTypeId, keyword);
+        
+        // 如果没有指定筛选部门，直接查询
+        if (filterDeptId == null) {
+            return taskItemMapper.selectAvailableItems(pageParam, taskTypeId, keyword);
+        }
+        
+        // 获取该部门可接单的任务类型ID列表
+        List<com.designhub.entity.DemandType> allDemandTypes = demandTypeMapper.selectList(null);
+        Map<Long, com.designhub.entity.DemandType> demandTypeMap = allDemandTypes.stream()
+            .collect(java.util.stream.Collectors.toMap(com.designhub.entity.DemandType::getId, dt -> dt));
+        
+        List<Long> filterDeptAllowedTypeIds = allDemandTypes.stream()
+            .filter(dt -> {
+                String allowedDepts = dt.getAllowedDeptIds();
+                if ((allowedDepts == null || allowedDepts.isEmpty()) && dt.getParentId() != null) {
+                    com.designhub.entity.DemandType parentType = demandTypeMap.get(dt.getParentId());
+                    if (parentType != null) {
+                        allowedDepts = parentType.getAllowedDeptIds();
+                    }
+                }
+                // 只筛选明确指定了该部门的任务类型
+                if (allowedDepts == null || allowedDepts.isEmpty()) {
+                    return false;
+                }
+                String[] deptIds = allowedDepts.split(",");
+                for (String deptId : deptIds) {
+                    if (deptId.trim().equals(String.valueOf(filterDeptId))) {
+                        return true;
+                    }
+                }
+                return false;
+            })
+            .map(com.designhub.entity.DemandType::getId)
+            .collect(java.util.stream.Collectors.toList());
+        
+        // 如果没有找到匹配的任务类型，返回空结果
+        if (filterDeptAllowedTypeIds.isEmpty()) {
+            return new Page<>(page, pageSize);
+        }
+        
+        // 查询并筛选
+        return taskItemMapper.selectAvailableItemsByTaskTypes(pageParam, taskTypeId, keyword, filterDeptAllowedTypeIds);
     }
 
     /**