diff --git a/example/src/app/gantt/gantt.component.ts b/example/src/app/gantt/gantt.component.ts
index f5fd11bd..4c892402 100644
--- a/example/src/app/gantt/gantt.component.ts
+++ b/example/src/app/gantt/gantt.component.ts
@@ -8,11 +8,10 @@ import {
     GanttItem,
     GanttPrintService,
     NgxGanttComponent,
-    GanttSelectedEvent,
-    GanttLinkLineType
+    GanttSelectedEvent
 } from 'ngx-gantt';
 import { of } from 'rxjs';
-import { delay } from 'rxjs/operators';
+import { delay, startWith } from 'rxjs/operators';
 import { ThyNotifyService } from 'ngx-tethys/notify';
 import { randomItems, random } from '../helper';
 
diff --git a/packages/gantt/src/gantt-upper.ts b/packages/gantt/src/gantt-upper.ts
index 70b4544f..5cb9d10f 100644
--- a/packages/gantt/src/gantt-upper.ts
+++ b/packages/gantt/src/gantt-upper.ts
@@ -58,11 +58,11 @@ export abstract class GanttUpper {
     @Input() viewOptions: GanttViewOptions = {};
 
     @Input() set linkOptions(options: GanttLinkOptions) {
-        this._linkOptions = Object.assign(options, this.config.linkOptions);
+        this._linkOptions = options;
     }
 
     get linkOptions() {
-        return this._linkOptions;
+        return Object.assign({}, defaultConfig.linkOptions, this.config.linkOptions, this._linkOptions);
     }
 
     @Input() disabledLoadOnScroll: boolean;
diff --git a/packages/gantt/src/gantt.component.ts b/packages/gantt/src/gantt.component.ts
index 7ccef54d..be804b12 100644
--- a/packages/gantt/src/gantt.component.ts
+++ b/packages/gantt/src/gantt.component.ts
@@ -29,8 +29,7 @@ import { coerceCssPixelValue } from '@angular/cdk/coercion';
 import { NgxGanttTableComponent } from './table/gantt-table.component';
 import { GANTT_ABSTRACT_TOKEN } from './gantt-abstract';
 import { defaultColumnWidth } from './components/table/gantt-table.component';
-import { defaultConfig, GanttGlobalConfig, GANTT_GLOBAL_CONFIG } from './gantt.config';
-import { GanttLinkOptions } from './class/link';
+import { GanttGlobalConfig, GANTT_GLOBAL_CONFIG } from './gantt.config';
 @Component({
     selector: 'ngx-gantt',
     templateUrl: './gantt.component.html',
@@ -84,7 +83,6 @@ export class NgxGanttComponent extends GanttUpper implements OnInit, AfterViewIn
 
     ngOnInit() {
         super.onInit();
-        this.linkOptions = Object.assign({}, defaultConfig.linkOptions, this.config?.linkOptions, this.linkOptions);
         this.ngZone.onStable.pipe(take(1)).subscribe(() => {
             this.dragContainer.linkDragStarted.pipe(takeUntil(this.ngUnsubscribe$)).subscribe((event: GanttLinkDragEvent) => {
                 this.linkDragStarted.emit(event);