diff --git a/model/model.go b/model/model.go
index 224cee0..77d0360 100644
--- a/model/model.go
+++ b/model/model.go
@@ -202,7 +202,7 @@ type Printer struct {
 	FlowFlag     int        `json:"flow_flag" db:"flow_flag"`         //是否超流量了，1表示超了
 	OfflineCount int        `json:"offline_count" db:"offline_count"` //掉线次数
 	UserId       string     `json:"user_id" db:"user_id"`             //打印机所属用户
-	PrintBill    int64      `json:"-" db:"-"`                         // 账户余额
+	PrintBill    int64      `json:"print_bill" db:"-"`                // 账户余额
 }
 
 type PrintMsg struct {