diff --git a/controllers/api_controller.go b/controllers/api_controller.go
index cf877d9e3..aaa8e0e85 100644
--- a/controllers/api_controller.go
+++ b/controllers/api_controller.go
@@ -193,16 +193,15 @@ end:
 //添加打印机,一次最多50条
 func (c *ApiController) AddPrinter(dataMap map[string]interface{}) (data, errCode string, err error) {
 	var (
-		printers    []*model.AddPrinterParam
-		printersStr string
-		appID       int
+		printers []*model.AddPrinterParam
+		appID    int
 	)
 	globals.SugarLogger.Debugf("Begin API AddPrinter data: [%v]", utils.Format4Output(dataMap, false))
 	if _, ok := dataMap["prints"].(string); !ok {
 		return buildParamErrCodeAndErr("prints_str_nil")
 	}
 
-	if err = utils.UnmarshalUseNumber([]byte(printersStr), &printers); err != nil {
+	if err = utils.UnmarshalUseNumber([]byte(dataMap["prints"].(string)), &printers); err != nil {
 		return buildParamErrCodeAndErr("prints_bind_fail")
 	}