diff --git a/README.md b/README.md
index 025e13c..94a9ade 100644
--- a/README.md
+++ b/README.md
@@ -617,10 +617,12 @@ class MyField extends Component {}
 
 `EasyField` 是对`Field`的二次封装，它提供了基于浏览器原生表单控件实现的表单域快捷调用，同时也提供了统一的 `value` `onChange` `onFocus` `onBlur` 等接口方法来与其它第三方组件库对接。
 
-**特别提醒：`EasyField`会默认对所有的字符串输入做前后空格的过滤。如果不需要这个特性，可以通过重写`$parser`属性来关闭该功能：**
+**特别提醒：`EasyField`会默认对所有的字符串输入做前后空格的过滤。如果不需要这个特性，可以通过重写`$parser`属性或者将其设置为`null`来关闭该功能：**
 
 ```javascript
 <EasyField name="name" type="username" $parser={value => value} />
+// OR
+<EasyField name="name" type="username" $parser={null} />
 ```
 
 `EasyField`内置了一些常用的校验方法，例如：
diff --git a/index.d.ts b/index.d.ts
index 5b73ead..96117be 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -22,8 +22,7 @@ export type FieldError<Validators> = { [K in keyof Validators]: DetectAny<Valida
 
 export interface FieldState<T = string, Validators = {}> {
     $value: T;
-    $modelValue: T;
-    $viewValue: any,
+    $viewValue: any;
     $valid: boolean;
     $invalid: boolean;
     $dirty: boolean;
@@ -167,8 +166,8 @@ export interface FieldComponentProps<T = string, P = {}, Fields = {}, WeakFields
     $onFieldChange?: ((newValue: T, preValue: T, $formutil: $Formutil<Fields, P, WeakFields>) => void);
     $validators?: Validators<T, Fields, P, WeakFields>;
     $asyncValidators?: never;
-    $parser?: ($viewValue: any, $setViewValue: ($newViewValue: any) => any) => T;
-    $formatter?: ($modelValue: T, $setModelValue: ($newModelValue: T) => T) => any;
+    $parser?: (($viewValue: any, $setViewValue: ($newViewValue: any) => any) => T) | null;
+    $formatter?: (($modelValue: T, $setModelValue: ($newModelValue: T) => T) => any) | null;
     name?: string;
     component?: React.ComponentType;
     render?: (($fieldutil: $Fieldutil<T, P>) => React.ReactNode);
@@ -245,7 +244,7 @@ export interface $Fieldutil<T = string, Validators = {}, Fields = {}, WeakFields
     $reset(newState?: Partial<FieldState<T, Validators>>): FieldState<T, Validators>;
 
     $render($viewValue: any, callback?: () => void): FieldState<T, Validators>;
-    $setValue($modelValue: any, callback?: () => void): FieldState<T, Validators>;
+    $setValue($modelValue: T, callback?: () => void): FieldState<T, Validators>;
     $setState(newState: Partial<FieldState<T, Validators>>, callback?: () => void): FieldState<T, Validators>;
     $setTouched(touched: boolean, callback?: () => void): FieldState<T, Validators>;
     $setDirty(dirty: boolean, callback?: () => void): FieldState<T, Validators>;