diff --git a/modules/combat/api_drop.go b/modules/combat/api_drop.go
index 335e7a92f..c8e59b821 100644
--- a/modules/combat/api_drop.go
+++ b/modules/combat/api_drop.go
@@ -38,10 +38,11 @@ func (this *apiComp) Drop(session comm.IUserSession, req *pb.CombatDropReq) (err
 	}
 	if lv, ok = info.Level[req.Level]; !ok {
 		errdata = &pb.ErrorData{
-			Code:  pb.ErrorCode_ReqParameterError,
-			Title: pb.ErrorCode_ReqParameterError.ToString(),
+			Code:    pb.ErrorCode_ReqParameterError,
+			Title:   pb.ErrorCode_ReqParameterError.ToString(),
+			Message: fmt.Sprintf("no in Level:%d", req.Level),
 		}
-		this.module.Errorf("no in Level:%s", req.Level)
+		this.module.Errorf("no in Level:%d", req.Level)
 		return
 	}
 
@@ -56,8 +57,9 @@ func (this *apiComp) Drop(session comm.IUserSession, req *pb.CombatDropReq) (err
 	for _, v := range lv.Passdrop {
 		if v == req.Drop {
 			errdata = &pb.ErrorData{
-				Code:  pb.ErrorCode_ReqParameterError,
-				Title: pb.ErrorCode_ReqParameterError.ToString(),
+				Code:    pb.ErrorCode_ReqParameterError,
+				Title:   pb.ErrorCode_ReqParameterError.ToString(),
+				Message: "Drop is Claimed!",
 			}
 			return
 		}