diff --git a/tencentcloud/resource_tc_tcr_customized_domain.go b/tencentcloud/resource_tc_tcr_customized_domain.go
index c9daaadde1..e926b36a14 100644
--- a/tencentcloud/resource_tc_tcr_customized_domain.go
+++ b/tencentcloud/resource_tc_tcr_customized_domain.go
@@ -41,6 +41,7 @@ func resourceTencentCloudTcrCustomizedDomain() *schema.Resource {
 	return &schema.Resource{
 		Create: resourceTencentCloudTcrCustomizedDomainCreate,
 		Read:   resourceTencentCloudTcrCustomizedDomainRead,
+		Update: resourceTencentCloudTcrCustomizedDomainUpdate,
 		Delete: resourceTencentCloudTcrCustomizedDomainDelete,
 		Importer: &schema.ResourceImporter{
 			State: schema.ImportStatePassthrough,
@@ -69,7 +70,6 @@ func resourceTencentCloudTcrCustomizedDomain() *schema.Resource {
 
 			"tags": {
 				Optional:    true,
-				ForceNew:    true,
 				Type:        schema.TypeMap,
 				Description: "Tag description list.",
 			},
@@ -192,6 +192,34 @@ func resourceTencentCloudTcrCustomizedDomainRead(d *schema.ResourceData, meta in
 	return nil
 }
 
+func resourceTencentCloudTcrCustomizedDomainUpdate(d *schema.ResourceData, meta interface{}) error {
+	defer logElapsed("resource.tencentcloud_tcr_customized_domain.update")()
+	defer inconsistentCheck(d, meta)()
+
+	logId := getLogId(contextNil)
+
+	immutableArgs := []string{"registry_id", "domain_name", "certificate_id"}
+
+	for _, v := range immutableArgs {
+		if d.HasChange(v) {
+			return fmt.Errorf("argument `%s` cannot be changed", v)
+		}
+	}
+	if d.HasChange("tags") {
+		ctx := context.WithValue(context.TODO(), logIdKey, logId)
+		tcClient := meta.(*TencentCloudClient).apiV3Conn
+		tagService := &TagService{client: tcClient}
+		oldTags, newTags := d.GetChange("tags")
+		replaceTags, deleteTags := diffTags(oldTags.(map[string]interface{}), newTags.(map[string]interface{}))
+		resourceName := BuildTagResourceName("tcr", "instance", tcClient.Region, d.Id())
+		if err := tagService.ModifyTags(ctx, resourceName, replaceTags, deleteTags); err != nil {
+			return err
+		}
+	}
+
+	return resourceTencentCloudTcrCustomizedDomainRead(d, meta)
+}
+
 func resourceTencentCloudTcrCustomizedDomainDelete(d *schema.ResourceData, meta interface{}) error {
 	defer logElapsed("resource.tencentcloud_tcr_customized_domain.delete")()
 	defer inconsistentCheck(d, meta)()
diff --git a/website/docs/r/tcr_customized_domain.html.markdown b/website/docs/r/tcr_customized_domain.html.markdown
index ea59dceecf..48ed329557 100644
--- a/website/docs/r/tcr_customized_domain.html.markdown
+++ b/website/docs/r/tcr_customized_domain.html.markdown
@@ -31,7 +31,7 @@ The following arguments are supported:
 * `certificate_id` - (Required, String, ForceNew) certificate id.
 * `domain_name` - (Required, String, ForceNew) custom domain name.
 * `registry_id` - (Required, String, ForceNew) instance id.
-* `tags` - (Optional, Map, ForceNew) Tag description list.
+* `tags` - (Optional, Map) Tag description list.
 
 ## Attributes Reference