diff --git a/components/auto-complete/autocomplete-trigger.directive.ts b/components/auto-complete/autocomplete-trigger.directive.ts
index 14eb1549b8..8dbb0d3025 100644
--- a/components/auto-complete/autocomplete-trigger.directive.ts
+++ b/components/auto-complete/autocomplete-trigger.directive.ts
@@ -111,6 +111,8 @@ export class NzAutocompleteTriggerDirective implements AfterViewInit, ControlVal
   }
 
   ngOnDestroy(): void {
+    this.destroy$.next();
+    this.destroy$.complete();
     this.destroyPanel();
   }