diff --git a/scss/components/form/_tree.scss b/scss/components/form/_tree.scss
index 8949898e0..3e5def7b2 100644
--- a/scss/components/form/_tree.scss
+++ b/scss/components/form/_tree.scss
@@ -32,8 +32,6 @@
         position: relative;
 
         >div {
-            color: inherit;
-
             &:hover {
                 text-decoration: none;
 
@@ -230,11 +228,13 @@
 
 
 
-    &-item &-item>&-itemLabel {
+    &-item &-item>&-itemLabel,
+    &-item>&-placeholder {
         padding-left: $Tree-indent;
     }
 
-    &-item &-item &-item>&-itemLabel {
+    &-item &-item &-item>&-itemLabel,
+    &-item &-item>&-placeholder {
         padding-left: $Tree-indent * 2;
     }
 
diff --git a/src/components/Tree.tsx b/src/components/Tree.tsx
index 7982fabf0..f90f61c0d 100644
--- a/src/components/Tree.tsx
+++ b/src/components/Tree.tsx
@@ -646,6 +646,8 @@ export class TreeSelector extends React.Component<
               ) : null}
               {childrenItems}
             </ul>
+          ) : !childrenItems && item.placeholder ? (
+            <div className={cx('Tree-placeholder')}>{item.placeholder}</div>
           ) : null}
         </li>
       );
@@ -674,7 +676,7 @@ export class TreeSelector extends React.Component<
 
     let addBtn = null;
 
-    if (creatable && hideRoot) {
+    if (creatable && rootCreatable !== false && hideRoot) {
       addBtn = (
         <a
           className={cx('Tree-addTopBtn', {
diff --git a/src/renderers/Form/Options.tsx b/src/renderers/Form/Options.tsx
index 2a0d36de7..7d26cb3ae 100644
--- a/src/renderers/Form/Options.tsx
+++ b/src/renderers/Form/Options.tsx
@@ -524,7 +524,13 @@ export function registerOptionsControl(config: OptionsConfig) {
       // 单独发请求
       if (skipForm && addApi) {
         try {
-          const payload = await env.fetcher(addApi!, result);
+          const payload = await env.fetcher(
+            addApi!,
+            createObject(data, result),
+            {
+              method: 'post'
+            }
+          );
 
           if (!payload.ok) {
             env.notify('error', payload.msg || '新增失败，请仔细检查');
@@ -580,6 +586,7 @@ export function registerOptionsControl(config: OptionsConfig) {
         labelField,
         onOpenDialog,
         editApi,
+        env,
         source,
         data,
         formItem: model,
@@ -616,6 +623,29 @@ export function registerOptionsControl(config: OptionsConfig) {
             createObject(data, value)
           );
 
+      // 单独发请求
+      if (skipForm && editApi) {
+        try {
+          const payload = await env.fetcher(
+            editApi!,
+            createObject(data, result),
+            {
+              method: 'post'
+            }
+          );
+
+          if (!payload.ok) {
+            env.notify('error', payload.msg || '保存失败，请仔细检查');
+          } else {
+            result = payload.data || result;
+          }
+        } catch (e) {
+          result = null;
+          console.error(e);
+          env.notify('error', e.message);
+        }
+      }
+
       // 没有结果，说明取消了。
       if (!result) {
         return;
@@ -670,7 +700,9 @@ export function registerOptionsControl(config: OptionsConfig) {
           throw new Error('请配置 deleteApi');
         }
 
-        const result = await env.fetcher(deleteApi!, ctx);
+        const result = await env.fetcher(deleteApi!, ctx, {
+          method: 'delete'
+        });
 
         if (!result.ok) {
           env.notify('error', result.msg || '删除失败，请重试');
diff --git a/src/utils/api.ts b/src/utils/api.ts
index 56db8c95c..484f1e21d 100644
--- a/src/utils/api.ts
+++ b/src/utils/api.ts
@@ -20,13 +20,13 @@ interface ApiCacheConfig extends ApiObject {
 
 const apiCaches: Array<ApiCacheConfig> = [];
 
-export function normalizeApi(api: Api): ApiObject {
+export function normalizeApi(api: Api, defaultMethod?: string): ApiObject {
   if (typeof api === 'string') {
     let method = rSchema.test(api) ? RegExp.$1 : '';
     method && (api = api.replace(method + ':', ''));
 
     api = {
-      method: method as any,
+      method: (method || defaultMethod) as any,
       url: api
     };
   } else {
@@ -46,7 +46,7 @@ export function buildApi(
     [propName: string]: any;
   } = {}
 ): ApiObject {
-  api = normalizeApi(api);
+  api = normalizeApi(api, options.method);
   const {autoAppend, ignoreData, ...rest} = options;
 
   api.config = {