diff --git a/server/marketserver/service/recharge.go b/server/marketserver/service/recharge.go
index 0c6d4c2e..65043737 100644
--- a/server/marketserver/service/recharge.go
+++ b/server/marketserver/service/recharge.go
@@ -3,6 +3,7 @@ package service
 import (
 	"q5"
 	"f5"
+	"strings"
 	"main/constant"
 )
 
@@ -31,6 +32,7 @@ func AddRechargeOrder(orderId string, shortOrderId string,
 	}
 	if email != "" {
 		q5.AppendSlice(&fields, []string{"email", email})
+		q5.AppendSlice(&fields, []string{"lower_case_email", strings.ToLower(email)})
 	}
 	f5.GetGoStyleDb().UpsertEx(
 		constant.BCNFT_DB,