diff --git a/backend/src/main/java/com/designhub/service/TaskService.java b/backend/src/main/java/com/designhub/service/TaskService.java
index 833b9d3..1373aed 100644
--- a/backend/src/main/java/com/designhub/service/TaskService.java
+++ b/backend/src/main/java/com/designhub/service/TaskService.java
@@ -3388,19 +3388,24 @@ public class TaskService {
         
         Long taskId = task.getId();
         
-        // 1. 如果任务已完成，需要回退积分
+        // 1. 如果任务已完成，需要回退积分（积分回退失败不影响删除）
         if ("completed".equals(task.getStatus())) {
             // 回退主任务积分
             if (task.getReceiverDeptId() != null && task.getScoreReward() != null 
                 && task.getScoreReward().compareTo(BigDecimal.ZERO) > 0) {
                 try {
-                    // 从团队积分池扣除已奖励的积分
-                    teamScorePoolService.deductScore(task.getReceiverDeptId(), task.getScoreReward().intValue());
-                    log.info("已回退主任务积分: deptId={}, score={}", task.getReceiverDeptId(), task.getScoreReward());
-                    
-                    // 回退部门月度积分统计
-                    deptMonthlyScoreService.deductEarnedScore(task.getReceiverDeptId(), task.getScoreReward());
-                    log.info("已回退部门月度积分: deptId={}, score={}", task.getReceiverDeptId(), task.getScoreReward());
+                    // 检查积分池是否存在
+                    if (teamScorePoolService.getByDeptId(task.getReceiverDeptId()) != null) {
+                        // 从团队积分池扣除已奖励的积分
+                        teamScorePoolService.deductScore(task.getReceiverDeptId(), task.getScoreReward().intValue());
+                        log.info("已回退主任务积分: deptId={}, score={}", task.getReceiverDeptId(), task.getScoreReward());
+                        
+                        // 回退部门月度积分统计
+                        deptMonthlyScoreService.deductEarnedScore(task.getReceiverDeptId(), task.getScoreReward());
+                        log.info("已回退部门月度积分: deptId={}, score={}", task.getReceiverDeptId(), task.getScoreReward());
+                    } else {
+                        log.warn("部门积分池不存在，跳过主任务积分回退: deptId={}", task.getReceiverDeptId());
+                    }
                 } catch (Exception e) {
                     log.warn("回退主任务积分失败: {}", e.getMessage());
                 }
@@ -3417,13 +3422,18 @@ public class TaskService {
             if ("completed".equals(item.getStatus()) && item.getReceiverDeptId() != null 
                 && item.getTotalScore() != null && item.getTotalScore().compareTo(BigDecimal.ZERO) > 0) {
                 try {
-                    // 从团队积分池扣除已奖励的积分
-                    teamScorePoolService.deductScore(item.getReceiverDeptId(), item.getTotalScore().intValue());
-                    log.info("已回退子任务积分: itemNo={}, deptId={}, score={}", 
-                            item.getItemNo(), item.getReceiverDeptId(), item.getTotalScore());
-                    
-                    // 回退部门月度积分统计
-                    deptMonthlyScoreService.deductEarnedScore(item.getReceiverDeptId(), item.getTotalScore());
+                    // 检查积分池是否存在
+                    if (teamScorePoolService.getByDeptId(item.getReceiverDeptId()) != null) {
+                        // 从团队积分池扣除已奖励的积分
+                        teamScorePoolService.deductScore(item.getReceiverDeptId(), item.getTotalScore().intValue());
+                        log.info("已回退子任务积分: itemNo={}, deptId={}, score={}", 
+                                item.getItemNo(), item.getReceiverDeptId(), item.getTotalScore());
+                        
+                        // 回退部门月度积分统计
+                        deptMonthlyScoreService.deductEarnedScore(item.getReceiverDeptId(), item.getTotalScore());
+                    } else {
+                        log.warn("部门积分池不存在，跳过子任务积分回退: itemNo={}, deptId={}", item.getItemNo(), item.getReceiverDeptId());
+                    }
                 } catch (Exception e) {
                     log.warn("回退子任务积分失败: itemNo={}, error={}", item.getItemNo(), e.getMessage());
                 }