diff --git a/backend/src/main/java/com/designhub/service/TeamScorePoolService.java b/backend/src/main/java/com/designhub/service/TeamScorePoolService.java
index 5e571fd..be66141 100644
--- a/backend/src/main/java/com/designhub/service/TeamScorePoolService.java
+++ b/backend/src/main/java/com/designhub/service/TeamScorePoolService.java
@@ -27,8 +27,18 @@ public class TeamScorePoolService {
     /**
      * 根据部门ID获取积分池
      * 使用 dept_id 关联部门（team_id 为遗留字段）。若当前部门无积分池且存在父部门，则向上查找父部门积分池（三级部门共享二级）。
+     * 如果当前部门有积分池但余额为0且从未充值，也向上查找父部门积分池（支持子部门共享上级积分）。
      */
     public TeamScorePool getByDeptId(Long deptId) {
+        return getByDeptIdInternal(deptId, true);
+    }
+    
+    /**
+     * 内部方法：根据部门ID获取积分池
+     * @param deptId 部门ID
+     * @param allowShareParent 是否允许共享父部门积分池
+     */
+    private TeamScorePool getByDeptIdInternal(Long deptId, boolean allowShareParent) {
         // 使用 selectList + findFirst 避免重复数据导致的 TooManyResultsException
         TeamScorePool pool = teamScorePoolMapper.selectList(
             new LambdaQueryWrapper<TeamScorePool>()
@@ -37,16 +47,52 @@ public class TeamScorePoolService {
                 .last("LIMIT 1")
         ).stream().findFirst().orElse(null);
 
+        // 判断是否需要向上查找父部门积分池
+        boolean shouldFindParent = false;
+        
         if (pool == null) {
+            // 情况1：当前部门没有积分池记录
+            shouldFindParent = true;
+            log.debug("部门{}没有积分池记录，尝试查找父部门积分池", deptId);
+        } else if (allowShareParent && isPoolEmptyAndNeverRecharged(pool)) {
+            // 情况2：当前部门有积分池但余额为0且从未充值（说明是系统自动创建的空记录）
+            shouldFindParent = true;
+            log.debug("部门{}的积分池余额为0且从未充值，尝试查找父部门共享积分池", deptId);
+        }
+        
+        if (shouldFindParent) {
             Department department = departmentMapper.selectById(deptId);
             if (department != null && department.getParentId() != null && department.getParentId() > 0) {
-                log.debug("部门{}没有积分池，查找父部门{}的积分池", deptId, department.getParentId());
-                return getByDeptId(department.getParentId());
+                TeamScorePool parentPool = getByDeptIdInternal(department.getParentId(), true);
+                if (parentPool != null && parentPool.getBalance() > 0) {
+                    log.info("部门{}将使用父部门{}的共享积分池(余额:{})", deptId, parentPool.getDeptId(), parentPool.getBalance());
+                    return parentPool;
+                }
             }
         }
 
         return pool;
     }
+    
+    /**
+     * 判断积分池是否为空且从未充值（系统自动创建的空记录）
+     */
+    private boolean isPoolEmptyAndNeverRecharged(TeamScorePool pool) {
+        if (pool == null) {
+            return true;
+        }
+        Integer balance = pool.getBalance() != null ? pool.getBalance() : 0;
+        Integer totalRecharge = pool.getTotalRecharge() != null ? pool.getTotalRecharge() : 0;
+        // 余额为0且从未充值过，说明是系统自动创建的空记录
+        return balance == 0 && totalRecharge == 0;
+    }
+    
+    /**
+     * 根据部门ID获取自己的积分池（不向上查找，用于充值等场景）
+     */
+    public TeamScorePool getOwnPoolByDeptId(Long deptId) {
+        return getByDeptIdInternal(deptId, false);
+    }
 
     /**
      * 检查积分是否足够
@@ -171,13 +217,20 @@ public class TeamScorePoolService {
     }
 
     /**
-     * 充值积分
+     * 充值积分（充值到自己的积分池，不使用共享的父部门积分池）
      */
     @Transactional(rollbackFor = Exception.class)
     public void rechargeScore(Long deptId, Integer score) {
-        TeamScorePool pool = getByDeptId(deptId);
+        // 充值时使用自己的积分池，不向上查找
+        TeamScorePool pool = getOwnPoolByDeptId(deptId);
         if (pool == null) {
-            throw new BusinessException("部门积分池不存在");
+            // 如果没有自己的积分池，创建一个
+            Department department = departmentMapper.selectById(deptId);
+            if (department != null) {
+                pool = upsertPoolForSelf(deptId, department.getDeptName());
+            } else {
+                throw new BusinessException("部门不存在");
+            }
         }
 
         pool.setBalance(pool.getBalance() + score);
@@ -260,6 +313,40 @@ public class TeamScorePoolService {
         }
         return pool;
     }
+    
+    /**
+     * 更新或创建自己的积分池（不向上查找，用于充值等需要操作自己积分池的场景）
+     */
+    @Transactional(rollbackFor = Exception.class)
+    public TeamScorePool upsertPoolForSelf(Long deptId, String deptName) {
+        // 直接查询自己的积分池，不向上查找
+        TeamScorePool pool = teamScorePoolMapper.selectList(
+            new LambdaQueryWrapper<TeamScorePool>()
+                .eq(TeamScorePool::getDeptId, deptId)
+                .orderByAsc(TeamScorePool::getId)
+                .last("LIMIT 1")
+        ).stream().findFirst().orElse(null);
+        
+        if (pool == null) {
+            pool = new TeamScorePool();
+            pool.setDeptId(deptId);
+            pool.setDeptName(deptName);
+            pool.setBalance(0);
+            pool.setTotalRecharge(0);
+            pool.setTotalConsume(0);
+            pool.setTotalEarn(0);
+            pool.setLimitEnabled(0);
+            pool.setAlertThreshold(80);
+            pool.setPeriodUsed(0);
+            pool.setPeriodLimit(0);
+            pool.setPeriodStartTime(LocalDateTime.now());
+            createPool(pool);
+        } else if (deptName != null && !deptName.equals(pool.getDeptName())) {
+            pool.setDeptName(deptName);
+            teamScorePoolMapper.updateById(pool);
+        }
+        return pool;
+    }
 
     /**
      * 更新积分池配置