diff --git a/ecs/instances.go b/ecs/instances.go
index dd424f96..373812ba 100644
--- a/ecs/instances.go
+++ b/ecs/instances.go
@@ -464,6 +464,7 @@ func (client *Client) ModifyInstanceAutoReleaseTime(instanceId, time string) err
 
 type DeleteInstanceArgs struct {
 	InstanceId string
+	Force bool
 }
 
 type DeleteInstanceResponse struct {
@@ -473,8 +474,8 @@ type DeleteInstanceResponse struct {
 // DeleteInstance deletes instance
 //
 // You can read doc at http://docs.aliyun.com/#/pub/ecs/open-api/instance&deleteinstance
-func (client *Client) DeleteInstance(instanceId string) error {
-	args := DeleteInstanceArgs{InstanceId: instanceId}
+func (client *Client) DeleteInstance(instanceId string, forceDelete bool) error {
+	args := DeleteInstanceArgs{InstanceId: instanceId, Force: forceDelete}
 	response := DeleteInstanceResponse{}
 	err := client.Invoke("DeleteInstance", &args, &response)
 	return err
diff --git a/ecs/instances_test.go b/ecs/instances_test.go
index b67699c6..6f7bbd46 100644
--- a/ecs/instances_test.go
+++ b/ecs/instances_test.go
@@ -87,7 +87,7 @@ func ExampleClient_DeleteInstance() {
 
 	client := NewTestClient()
 
-	err := client.DeleteInstance(TestInstanceId)
+	err := client.DeleteInstance(TestInstanceId, false)
 
 	if err != nil {
 		fmt.Printf("Failed to delete Instance %s vnc url: %v \n", TestInstanceId, err)
@@ -177,7 +177,7 @@ func TestECSInstanceCreationAndDeletion(t *testing.T) {
 	}
 	t.Logf("Instance %s is stopped successfully.", instanceId)
 
-	err = client.DeleteInstance(instanceId)
+	err = client.DeleteInstance(instanceId, false)
 
 	if err != nil {
 		t.Errorf("Failed to delete instance %s: %v", instanceId, err)
@@ -280,7 +280,7 @@ func TestLocationECSClient(t *testing.T) {
 	t.Logf("InstanceAttribute is %++v", attr)
 
 	//DeleteInstance
-	err = client.DeleteInstance(instanceId)
+	err = client.DeleteInstance(instanceId, false)
 	if err != nil {
 		t.Fatalf("Failed to delete instance %++v", err)
 	}
diff --git a/ecs/vpcs_test.go b/ecs/vpcs_test.go
index 8baadcf0..7b1653ee 100644
--- a/ecs/vpcs_test.go
+++ b/ecs/vpcs_test.go
@@ -95,7 +95,7 @@ func TestVPCCreationAndDeletion(t *testing.T) {
 					}
 					t.Logf("Instance %s is stopped successfully.", instanceId)
 				}
-				err = client.DeleteInstance(instanceId)
+				err = client.DeleteInstance(instanceId, false)
 
 				if err != nil {
 					t.Errorf("Failed to delete instance %s: %v", instanceId, err)