diff --git a/internal/service/agent/agent_service.go b/internal/service/agent/agent_service.go
index 98b84af..fdb6d6d 100644
--- a/internal/service/agent/agent_service.go
+++ b/internal/service/agent/agent_service.go
@@ -140,8 +140,10 @@ func (s *AgentServiceV1) AgentPutInfoReq(ctx context.Context, req *v1.AgentPutIn
 	err = tx.Commit()
 	//按照新费率计算余额
 	newBalance := utils.TransformBalance(oldBalance, req.Rate)
-	// 6. 更新用户余额
-	balance.BalanceService.ChangeUserBalance(ctx, user.ID, newBalance.Sub(oldBalance))
+	// 6. 更新用户余额(如果更新了费率或者第一次改为代理)
+	if user.Edges.Agent == nil || !user.Edges.Agent.Rate.Equal(req.Rate) {
+		balance.BalanceService.ChangeUserBalance(ctx, user.ID, newBalance.Sub(user.Balance))
+	}
 	utils.OkOrPanic(err, func(err error) error {
 		return oops.
 			WithContext(ctx).