diff --git a/models/pad_signer.go b/models/pad_signer.go
index 5fa2fe3..85597a0 100644
--- a/models/pad_signer.go
+++ b/models/pad_signer.go
@@ -19,6 +19,6 @@ func (t *PadSigner) TableName() string {
 }
 
 func ListPadSignerByActivityId(activityId int) (signers []*PadSigner, err error) {
-	err = core.GetXormAuto().Where("activity_id=? and is_delete=0", activityId).Find(&signers)
+	err = core.GetXormAuto().Where("activity_id=? and is_delete=0", activityId).Asc("sid").Find(&signers)
 	return
 }