diff --git a/alicloud/resource_alicloud_dcdn_domain.go b/alicloud/resource_alicloud_dcdn_domain.go
index f8c04d1e507f..0dc40ff61326 100644
--- a/alicloud/resource_alicloud_dcdn_domain.go
+++ b/alicloud/resource_alicloud_dcdn_domain.go
@@ -361,7 +361,7 @@ func resourceAliCloudDcdnDomainUpdate(d *schema.ResourceData, meta interface{})
 
 	if !d.IsNewResource() && d.HasChange("scope") {
 		update = true
-		request["Property"] = d.Get("scope")
+		request["Property"] = fmt.Sprintf(`{"coverage":"%s"}`, d.Get("scope"))
 	}
 
 	if update {
diff --git a/alicloud/resource_alicloud_dcdn_domain_test.go b/alicloud/resource_alicloud_dcdn_domain_test.go
index cae0d88a095d..deeb933553b6 100644
--- a/alicloud/resource_alicloud_dcdn_domain_test.go
+++ b/alicloud/resource_alicloud_dcdn_domain_test.go
@@ -131,6 +131,7 @@ func TestAccAliCloudDcdnDomain_basic0(t *testing.T) {
 					testAccCheck(map[string]string{
 						"domain_name": name,
 						"sources.#":   "1",
+						"scope":       "overseas",
 					}),
 				),
 			},
@@ -740,6 +741,16 @@ func TestAccAliCloudDcdnDomain_basic7246_change(t *testing.T) {
 					}),
 				),
 			},
+			{
+				Config: testAccConfig(map[string]interface{}{
+					"scope": "global",
+				}),
+				Check: resource.ComposeTestCheckFunc(
+					testAccCheck(map[string]string{
+						"scope": "global",
+					}),
+				),
+			},
 			{
 				ResourceName:            resourceId,
 				ImportState:             true,