diff --git a/backend/src/main/java/com/designhub/service/AnalyticsService.java b/backend/src/main/java/com/designhub/service/AnalyticsService.java
index 2a02fbc..bb0d974 100644
--- a/backend/src/main/java/com/designhub/service/AnalyticsService.java
+++ b/backend/src/main/java/com/designhub/service/AnalyticsService.java
@@ -2089,6 +2089,8 @@ public class AnalyticsService {
         List<Department> departments = departmentMapper.selectList(null);
         Map<Long, String> deptNames = departments.stream()
             .collect(Collectors.toMap(d -> d.getId(), d -> d.getDeptName(), (a, b) -> a));
+        Map<Long, Long> deptParentIds = departments.stream()
+            .collect(Collectors.toMap(d -> d.getId(), d -> d.getParentId() != null ? d.getParentId() : 0L, (a, b) -> a));
         
         // 🔥 获取每个部门的人数（包含部门负责人）
         Map<Long, Integer> deptMemberCounts = new HashMap<>();
@@ -2110,7 +2112,17 @@ public class AnalyticsService {
             
             DimensionAnalysisVO.ReceivingDeptAnalysis analysis = new DimensionAnalysisVO.ReceivingDeptAnalysis();
             analysis.setDeptId(deptId);
-            analysis.setDeptName(deptNames.getOrDefault(deptId, "未知部门"));
+            
+            // 🔥 如果是子部门且有同名部门，显示为"父部门-子部门"格式
+            String deptName = deptNames.getOrDefault(deptId, "未知部门");
+            Long parentId = deptParentIds.getOrDefault(deptId, 0L);
+            if (parentId != null && parentId > 0) {
+                String parentName = deptNames.get(parentId);
+                if (parentName != null && !parentName.isEmpty()) {
+                    deptName = parentName + "-" + deptName;
+                }
+            }
+            analysis.setDeptName(deptName);
             analysis.setTotalTasks(deptTasks.size());
             
             // 🔥 设置部门人数