diff --git a/backend/src/main/java/com/designhub/service/AnalyticsService.java b/backend/src/main/java/com/designhub/service/AnalyticsService.java
index 9a8ebac..7cd55b3 100644
--- a/backend/src/main/java/com/designhub/service/AnalyticsService.java
+++ b/backend/src/main/java/com/designhub/service/AnalyticsService.java
@@ -2452,13 +2452,24 @@ public class AnalyticsService {
     
     /**
      * 获取一级需求部门排名
+     * 显示所有一级需求部门（包括没有发起过任务的部门）
      */
     public List<PrimaryDeptRankingVO> getPrimaryDeptRanking(LocalDateTime startTime, LocalDateTime endTime) {
         log.info("获取一级需求部门排名: startTime={}, endTime={}", startTime, endTime);
         
         List<PrimaryDeptRankingVO> result = new java.util.ArrayList<>();
         
-        // 查询所有一级需求部门的任务
+        // 1. 获取所有一级需求部门
+        List<Department> allPrimaryDepts = departmentMapper.selectList(
+            new LambdaQueryWrapper<Department>()
+                .eq(Department::getDeptType, "primary_demand")
+                .eq(Department::getStatus, 1)
+                .eq(Department::getDeleted, 0)
+        );
+        
+        log.info("找到 {} 个一级需求部门", allPrimaryDepts.size());
+        
+        // 2. 查询时间范围内的一级需求任务
         LambdaQueryWrapper<Task> queryWrapper = new LambdaQueryWrapper<>();
         queryWrapper.eq(Task::getIsPrimaryTask, 1)
                    .ge(Task::getCreateTime, startTime)
@@ -2467,52 +2478,47 @@ public class AnalyticsService {
         
         List<Task> allTasks = taskMapper.selectList(queryWrapper);
         
-        // 按一级部门分组
+        // 3. 按一级部门分组
         java.util.Map<Long, List<Task>> tasksByDept = allTasks.stream()
             .filter(t -> t.getPrimaryPublisherDeptId() != null)
             .collect(java.util.stream.Collectors.groupingBy(Task::getPrimaryPublisherDeptId));
         
-        for (java.util.Map.Entry<Long, List<Task>> entry : tasksByDept.entrySet()) {
-            Long deptId = entry.getKey();
-            List<Task> deptTasks = entry.getValue();
+        // 4. 为每个一级需求部门创建统计数据
+        for (Department dept : allPrimaryDepts) {
+            Long deptId = dept.getId();
+            List<Task> deptTasks = tasksByDept.getOrDefault(deptId, new java.util.ArrayList<>());
             
             PrimaryDeptRankingVO vo = new PrimaryDeptRankingVO();
             vo.setDeptId(deptId);
+            vo.setDeptName(dept.getDeptName());
             
-            // 获取部门名称和上级部门名称
-            Department dept = departmentMapper.selectById(deptId);
-            vo.setDeptName(dept != null ? dept.getDeptName() : "未知部门");
+            // 获取一级部门和二级部门名称（向上查找部门层级）
+            List<Department> hierarchy = new java.util.ArrayList<>();
+            Department current = dept;
+            while (current != null && current.getParentId() != null && current.getParentId() > 0) {
+                Department parent = departmentMapper.selectById(current.getParentId());
+                if (parent != null) {
+                    hierarchy.add(0, parent); // 插入到列表开头
+                }
+                current = parent;
+            }
             
-            // 获取一级部门和二级部门名称
-            if (dept != null) {
-                // 向上查找部门层级
-                List<Department> hierarchy = new java.util.ArrayList<>();
-                Department current = dept;
-                while (current != null && current.getParentId() != null && current.getParentId() > 0) {
-                    Department parent = departmentMapper.selectById(current.getParentId());
-                    if (parent != null) {
-                        hierarchy.add(0, parent); // 插入到列表开头
-                    }
-                    current = parent;
-                }
-                
-                // hierarchy 现在从根部门到当前部门的父部门
-                // 一级部门是 hierarchy[0]，二级部门是 hierarchy[1]（如果存在）
-                if (hierarchy.size() >= 1) {
-                    vo.setFirstLevelDeptName(hierarchy.get(0).getDeptName());
-                }
-                if (hierarchy.size() >= 2) {
-                    vo.setSecondLevelDeptName(hierarchy.get(1).getDeptName());
-                }
+            // hierarchy 现在从根部门到当前部门的父部门
+            // 一级部门是 hierarchy[0]，二级部门是 hierarchy[1]（如果存在）
+            if (hierarchy.size() >= 1) {
+                vo.setFirstLevelDeptName(hierarchy.get(0).getDeptName());
+            }
+            if (hierarchy.size() >= 2) {
+                vo.setSecondLevelDeptName(hierarchy.get(1).getDeptName());
             }
             
             vo.setTaskCount(deptTasks.size());
             
             // 计算审核通过率
-            long approvedCount = deptTasks.stream()
-                .filter(t -> !"rejected_by_demand".equals(t.getApprovalStatus()) && !"draft".equals(t.getStatus()))
-                .count();
             if (deptTasks.size() > 0) {
+                long approvedCount = deptTasks.stream()
+                    .filter(t -> !"rejected_by_demand".equals(t.getApprovalStatus()) && !"draft".equals(t.getStatus()))
+                    .count();
                 vo.setApprovalRate(BigDecimal.valueOf(approvedCount * 100.0 / deptTasks.size())
                     .setScale(2, RoundingMode.HALF_UP));
             } else {
@@ -2550,6 +2556,7 @@ public class AnalyticsService {
             result.get(i).setRank(i + 1);
         }
         
+        log.info("一级需求部门排名统计完成，共 {} 个部门", result.size());
         return result;
     }