diff --git a/internal/service/energy_service.go b/internal/service/energy_service.go
index 3b89efd..2a37a54 100644
--- a/internal/service/energy_service.go
+++ b/internal/service/energy_service.go
@@ -63,6 +63,9 @@ func (s *EnergyService) Energize(energizerID uint, postID uint, amount int) (int
 	}
 
 	var expGained int
+	var needExpUpdate bool
+	var expToday time.Time
+	var expTotal int
 
 	err := s.db.Transaction(func(tx *gorm.DB) error {
 		txRepo := s.repo.WithTx(tx)
@@ -153,7 +156,7 @@ func (s *EnergyService) Energize(energizerID uint, postID uint, amount int) (int
 			return fmt.Errorf("创建被赋能者流水失败: %w", err)
 		}
 
-		// 10. 计算经验值（溢出截断）
+		// 10. 计算经验值（溢出截断）—— 在事务内读取以保证一致性
 		loc, _ := time.LoadLocation("Asia/Shanghai")
 		now := time.Now().In(loc)
 		today := time.Date(now.Year(), now.Month(), now.Day(), 0, 0, 0, 0, loc)
@@ -173,30 +176,38 @@ func (s *EnergyService) Energize(energizerID uint, postID uint, amount int) (int
 			expGain = expRoom
 		}
 
-		// 11. 增加经验 + 更新每日经验汇总
-		if expGain > 0 {
-			if s.expSvc != nil {
-				_, _, err = s.expSvc.AddExp(energizerID, expGain)
-				if err != nil {
-					return fmt.Errorf("增加经验失败: %w", err)
-				}
-			}
-
-			newSummary := &model.DailyExpSummary{
-				UserID:    energizerID,
-				Date:      today,
-				ExpEarned: currentDaily + expGain,
-			}
-			if err := txRepo.UpsertDailyExp(newSummary); err != nil {
-				return fmt.Errorf("更新每日经验汇总失败: %w", err)
-			}
-		}
-
 		expGained = expGain
+		if expGain > 0 {
+			needExpUpdate = true
+			expToday = today
+			expTotal = currentDaily + expGain
+		}
 		return nil
 	})
+	if err != nil {
+		return 0, err
+	}
 
-	return expGained, err
+	// 11. 事务提交后，在事务外增加经验 + 更新每日汇总
+	// 必须在事务外执行：LevelService.AddExp 也操作 users 表，
+	// 若在事务内调用会造成连接池不同连接间行锁死锁。
+	if needExpUpdate {
+		if s.expSvc != nil {
+			if _, _, err := s.expSvc.AddExp(energizerID, expGained); err != nil {
+				return expGained, fmt.Errorf("赋能成功，但增加经验失败: %w", err)
+			}
+		}
+		newSummary := &model.DailyExpSummary{
+			UserID:    energizerID,
+			Date:      expToday,
+			ExpEarned: expTotal,
+		}
+		if err := s.repo.UpsertDailyExp(newSummary); err != nil {
+			return expGained, fmt.Errorf("赋能成功，但更新经验汇总失败: %w", err)
+		}
+	}
+
+	return expGained, nil
 }
 
 // CheckInEnergy 签到获得域能（LV0 用户不调用此方法）