diff --git a/src/renderers/Form/Combo.tsx b/src/renderers/Form/Combo.tsx
index a0dbf3d2..f6839409 100644
--- a/src/renderers/Form/Combo.tsx
+++ b/src/renderers/Form/Combo.tsx
@@ -102,20 +102,22 @@ export default class ComboControl extends React.Component<ComboProps> {
     componentWillMount() {
         const {
             store,
+            value,
             minLength,
             maxLength
         } = this.props;
 
         store.config({
             minLength,
-            maxLength
+            maxLength,
+            length: this.getValueAsArray().length
         });
     }
 
     componentWillReceiveProps(nextProps:ComboProps) {
         const props = this.props;
 
-        if (anyChanged(['minLength', 'maxLength'], props, nextProps)) {
+        if (anyChanged(['minLength', 'maxLength', 'value'], props, nextProps)) {
             const {
                 store,
                 minLength,
@@ -124,11 +126,30 @@ export default class ComboControl extends React.Component<ComboProps> {
     
             store.config({
                 minLength,
-                maxLength
+                maxLength,
+                length: this.getValueAsArray(nextProps).length
             });
         }
     }
 
+    getValueAsArray(props = this.props) {
+        const {
+            flat,
+            joinValues,
+            delimiter,
+        } = props;
+        let value = props.value;
+
+        if (joinValues && flat && typeof value === 'string') {
+            value = value.split(delimiter || ',');
+        } else if (!Array.isArray(value)) {
+            value = [];
+        } else {
+            value = value.concat();
+        }
+        return value;
+    }
+
     addItem() {
         const {
             flat,
@@ -137,19 +158,12 @@ export default class ComboControl extends React.Component<ComboProps> {
             scaffold,
             disabled
         } = this.props;
-        let value = this.props.value;
 
         if (disabled) {
             return;
         }
 
-        if (joinValues && flat && typeof value === 'string') {
-            value = value.split(delimiter || ',');
-        } else if (!Array.isArray(value)) {
-            value = [];
-        } else {
-            value = value.concat();
-        }
+        let value = this.getValueAsArray();
 
         value.push(flat ? scaffold || '' : {
             ...scaffold
@@ -179,15 +193,7 @@ export default class ComboControl extends React.Component<ComboProps> {
             return;
         }
 
-        let value = this.props.value;
-
-        if (joinValues && flat && typeof value === 'string') {
-            value = value.split(delimiter || ',');
-        } else if (!Array.isArray(value)) {
-            value = [];
-        } else {
-            value = value.concat();
-        }
+        let value = this.getValueAsArray();
         
         if (deleteApi) {
             const ctx = createObject(data, value[key]);
@@ -220,18 +226,15 @@ export default class ComboControl extends React.Component<ComboProps> {
             flat,
             store,
             joinValues,
-            delimiter
+            delimiter,
+            disabled
         } = this.props;
-        let value = this.props.value;
 
-        if (joinValues && flat && typeof value === 'string') {
-            value = value.split(delimiter || ',');
-        } else if (!Array.isArray(value)) {
-            value = [];
-        } else {
-            value = value.concat();
+        if (disabled) {
+            return;
         }
 
+        let value = this.getValueAsArray();
         value[index] = flat ? values.flat : {...values};
 
         if (flat && joinValues) {
@@ -357,7 +360,8 @@ export default class ComboControl extends React.Component<ComboProps> {
 
     formatValue(value:any) {
         const {
-            flat        } = this.props;
+            flat
+        } = this.props;
 
         if (flat) {
             return {
@@ -401,6 +405,10 @@ export default class ComboControl extends React.Component<ComboProps> {
             value = value.split(delimiter || ',');
         }
 
+        const finnalRemovable = store.removable !== false // minLength ?
+            && !disabled // 控件自身是否禁用
+            && removable !== false; // 是否可以删除
+
         return (
             <div 
                 className={cx(`Combo Combo--multi`, multiLine ? `Combo--ver` : `Combo--hor`, noBorder ? `Combo--noBorder` : '')}
@@ -423,8 +431,7 @@ export default class ComboControl extends React.Component<ComboProps> {
                         }
 
                         if (
-                            !disabled // 控件自身是否禁用
-                            && removable !== false // 是否可以删除
+                            finnalRemovable
                             && ( // 表达式判断单条是否可删除
                                 !itemRemovableOn 
                                 || evalExpression(itemRemovableOn, value) !== false
diff --git a/src/store/combo.ts b/src/store/combo.ts
index 2c4394c1..86870b7d 100644
--- a/src/store/combo.ts
+++ b/src/store/combo.ts
@@ -29,11 +29,12 @@ export const ComboStore = iRendererStore
         uniques: types.map(UniqueGroup),
         forms: types.array(types.reference(types.late(() => FormStore))),
         minLength: 0,
-        maxLength: 0
+        maxLength: 0,
+        length: 0
     })
     .views(self => ({
         get addable() {
-            if (self.maxLength && self.forms.length >= self.maxLength) {
+            if (self.maxLength && self.length >= self.maxLength) {
                 return false;
             }
 
@@ -61,7 +62,7 @@ export const ComboStore = iRendererStore
         },
 
         get removable() {
-            if (self.minLength && self.minLength >= self.forms.length) {
+            if (self.minLength && self.minLength >= self.length) {
                 return false;
             }
 
@@ -69,9 +70,14 @@ export const ComboStore = iRendererStore
         }
     }))
     .actions(self => {
-        function config(setting:Partial<SComboStore>) {
+        function config(setting: {
+            minLength?: number;
+            maxLength?: number;
+            length?: number;
+        }) {
             typeof setting.minLength !== 'undefined' && (self.minLength = setting.minLength);
             typeof setting.maxLength !== 'undefined' && (self.maxLength = setting.maxLength);
+            typeof setting.length !== 'undefined' && (self.length = setting.length);
         }
 
         function bindUniuqueItem(item:IFormItemStore) {