diff --git a/components/cascader/nz-cascader.component.ts b/components/cascader/nz-cascader.component.ts
index e6e3e77f794..ac9c008e2bc 100644
--- a/components/cascader/nz-cascader.component.ts
+++ b/components/cascader/nz-cascader.component.ts
@@ -1072,7 +1072,7 @@ export class NzCascaderComponent implements OnInit, OnDestroy, ControlValueAcces
     this.clearDelaySelectTimer();
     if (doSelect) {
       this.delaySelectTimer = setTimeout(() => {
-        // 鼠标滑入只展开 children 不进行选中操作
+        // 鼠标滑入只展开，不进行选中操作
         this.setActiveOption(option, index);
         this.delaySelectTimer = null;
       }, 150);
diff --git a/components/cascader/nz-cascader.spec.ts b/components/cascader/nz-cascader.spec.ts
index 228da7ffe8c..fbe033d25dc 100644
--- a/components/cascader/nz-cascader.spec.ts
+++ b/components/cascader/nz-cascader.spec.ts
@@ -1176,79 +1176,6 @@ describe('cascader', () => {
       expect(overlayContainerElement.querySelectorAll('.ant-cascader-menu').length).toBe(0); // 0列
       expect(testComponent.cascader.isMenuVisible()).toBe(false);
     }));
-    it('should change on hover work', fakeAsync(() => {
-      testComponent.nzChangeOnSelect = true;
-      testComponent.nzExpandTrigger = 'hover';
-      fixture.detectChanges();
-      expect(testComponent.values).toBeNull();
-      expect(overlayContainerElement.querySelectorAll('.ant-cascader-menu').length).toBe(0); // 0列
-      expect(testComponent.values).toBeNull(); // not select yet
-
-      testComponent.cascader.setMenuVisible(true);
-      fixture.detectChanges();
-      expect(overlayContainerElement.querySelectorAll('.ant-cascader-menu').length).toBe(1); // 1列
-      expect(testComponent.values).toBeNull(); // not select yet
-
-      const itemEl1 = overlayContainerElement.querySelector('.ant-cascader-menu:nth-child(1) .ant-cascader-menu-item:nth-child(1)') as HTMLElement; // 第1列第1个
-      expect(itemEl1.classList).not.toContain('ant-cascader-menu-item-active');
-      dispatchMouseEvent(itemEl1, 'mouseenter');
-      fixture.detectChanges();
-      tick(200);
-      fixture.detectChanges();
-
-      expect(testComponent.cascader.isMenuVisible()).toBe(true);
-      expect(itemEl1.classList).toContain('ant-cascader-menu-item-active');
-      expect(overlayContainerElement.querySelectorAll('.ant-cascader-menu').length).toBe(2); // 2列
-      expect(testComponent.values).toBeDefined();
-      expect(testComponent.values.length).toBe(1);
-      expect(testComponent.values[ 0 ]).toBe('zhejiang');
-
-      const itemEl2 = overlayContainerElement.querySelector('.ant-cascader-menu:nth-child(2) .ant-cascader-menu-item:nth-child(1)') as HTMLElement; // 第2列第1个
-      expect(itemEl1.classList).toContain('ant-cascader-menu-item-active');
-      expect(itemEl2.classList).not.toContain('ant-cascader-menu-item-active');
-      dispatchMouseEvent(itemEl2, 'mouseenter');
-      fixture.detectChanges();
-      tick(200);
-      fixture.detectChanges();
-
-      expect(testComponent.cascader.isMenuVisible()).toBe(true);
-      expect(itemEl1.classList).toContain('ant-cascader-menu-item-active');
-      expect(itemEl2.classList).toContain('ant-cascader-menu-item-active');
-      expect(overlayContainerElement.querySelectorAll('.ant-cascader-menu').length).toBe(3); // 3列
-      expect(testComponent.values).toBeDefined();
-      expect(testComponent.values.length).toBe(2);
-      expect(testComponent.values[ 0 ]).toBe('zhejiang');
-      expect(testComponent.values[ 1 ]).toBe('hangzhou');
-
-      const itemEl3 = overlayContainerElement.querySelector('.ant-cascader-menu:nth-child(3) .ant-cascader-menu-item:nth-child(1)') as HTMLElement; // 第3列第1个
-      expect(itemEl1.classList).toContain('ant-cascader-menu-item-active');
-      expect(itemEl2.classList).toContain('ant-cascader-menu-item-active');
-      expect(itemEl3.classList).not.toContain('ant-cascader-menu-item-active');
-      dispatchMouseEvent(itemEl3, 'mouseenter');
-      fixture.detectChanges();
-      tick(200);
-      fixture.detectChanges();
-
-      expect(testComponent.values).toBeDefined();
-      expect(testComponent.values.length).toBe(2);
-      expect(testComponent.values[ 0 ]).toBe('zhejiang');
-      expect(testComponent.values[ 1 ]).toBe('hangzhou');
-
-      itemEl3.click();
-      fixture.detectChanges();
-      tick(200);
-      fixture.detectChanges();
-
-      expect(testComponent.values).toBeDefined();
-      expect(testComponent.values.length).toBe(3);
-      expect(testComponent.values[ 0 ]).toBe('zhejiang');
-      expect(testComponent.values[ 1 ]).toBe('hangzhou');
-      expect(testComponent.values[ 2 ]).toBe('xihu');
-      flush(); // wait for cdk-overlay to close
-      fixture.detectChanges();
-      expect(overlayContainerElement.querySelectorAll('.ant-cascader-menu').length).toBe(0); // 0列
-      expect(testComponent.cascader.isMenuVisible()).toBe(false);
-    }));
     it('should change on function work', fakeAsync(() => {
       testComponent.nzChangeOn = testComponent.fakeChangeOn;
       fixture.detectChanges();