diff --git a/main.go b/main.go
index 4c8ef72..1a4831f 100644
--- a/main.go
+++ b/main.go
@@ -116,6 +116,7 @@ func main() {
 	pf := perfectshutdown.New()
 
 	pf.Loop(func(index int, cxt *perfectshutdown.PerfectShutdown) {
+
 		ldapconn, err := ldap.DialURL("ldap://ldap.yuandian.com:389")
 		if err != nil {
 			log.Fatal(err)
@@ -200,7 +201,6 @@ func main() {
 					allperson = append(allperson, dn)
 					persondict[dn] = true
 				}
-
 			}
 
 			if department.DepartID > 1 {
@@ -210,13 +210,15 @@ func main() {
 					}
 				}
 			}
-
 			log.Println(string(resp.Content()))
 		}
 
-		if !LdapGroupAdd(ldapconn, "源典所有成员", "源典所有成员", allperson) {
-			LdapGroupModify(ldapconn, "源典所有成员", "源典所有成员", allperson)
+		if len(allperson) > 0 {
+			if !LdapGroupAdd(ldapconn, "源典所有成员", "源典所有成员", allperson) {
+				LdapGroupModify(ldapconn, "源典所有成员", "源典所有成员", allperson)
+			}
 		}
+
 		cxt.Wait(time.Minute * 5)
 	})