diff --git a/package.json b/package.json
index 8ac2c216..c00b4a9e 100644
--- a/package.json
+++ b/package.json
@@ -56,6 +56,7 @@
     "gh-pages": "^3.1.0",
     "glob": "^7.1.6",
     "np": "^7.6.0",
+    "prettier": "^2.7.1",
     "rc-form": "^2.4.0",
     "rc-trigger": "^5.0.4",
     "react": "^16.0.0",
diff --git a/src/Cascader.tsx b/src/Cascader.tsx
index 2b5d4b11..778e8370 100644
--- a/src/Cascader.tsx
+++ b/src/Cascader.tsx
@@ -1,21 +1,21 @@
-import * as React from 'react';
+import type { BaseSelectProps, BaseSelectPropsWithoutPrivate, BaseSelectRef } from 'rc-select';
+import { BaseSelect } from 'rc-select';
+import type { DisplayValueType, Placement } from 'rc-select/lib/BaseSelect';
 import useId from 'rc-select/lib/hooks/useId';
 import { conductCheck } from 'rc-tree/lib/utils/conductUtil';
 import useMergedState from 'rc-util/lib/hooks/useMergedState';
-import type { DisplayValueType, Placement } from 'rc-select/lib/BaseSelect';
-import type { BaseSelectRef, BaseSelectPropsWithoutPrivate, BaseSelectProps } from 'rc-select';
-import { BaseSelect } from 'rc-select';
-import OptionList from './OptionList';
+import * as React from 'react';
 import CascaderContext from './context';
-import { fillFieldNames, toPathKey, toPathKeys, SHOW_PARENT, SHOW_CHILD } from './utils/commonUtil';
 import useDisplayValues from './hooks/useDisplayValues';
-import useRefFunc from './hooks/useRefFunc';
 import useEntities from './hooks/useEntities';
-import { formatStrategyValues, toPathOptions } from './utils/treeUtil';
+import useMissingValues from './hooks/useMissingValues';
+import useRefFunc from './hooks/useRefFunc';
 import useSearchConfig from './hooks/useSearchConfig';
 import useSearchOptions from './hooks/useSearchOptions';
-import warning from 'rc-util/lib/warning';
-import useMissingValues from './hooks/useMissingValues';
+import OptionList from './OptionList';
+import { fillFieldNames, SHOW_CHILD, SHOW_PARENT, toPathKey, toPathKeys } from './utils/commonUtil';
+import { formatStrategyValues, toPathOptions } from './utils/treeUtil';
+import warningProps, { warningNullOptions } from './utils/warningPropsUtil';
 
 export interface ShowSearchType<OptionType extends BaseOptionType = DefaultOptionType> {
   filter?: (inputValue: string, options: OptionType[], fieldNames: FieldNames) => boolean;
@@ -134,7 +134,7 @@ export type CascaderProps<OptionType extends BaseOptionType = DefaultOptionType>
   | SingleCascaderProps<OptionType>
   | MultipleCascaderProps<OptionType>;
 
-type InternalCascaderProps<OptionType extends BaseOptionType = DefaultOptionType> = Omit<
+export type InternalCascaderProps<OptionType extends BaseOptionType = DefaultOptionType> = Omit<
   SingleCascaderProps<OptionType> | MultipleCascaderProps<OptionType>,
   'onChange'
 > & {
@@ -412,22 +412,6 @@ const Cascader = React.forwardRef<CascaderRef, InternalCascaderProps>((props, re
   };
 
   // ============================ Open ============================
-  if (process.env.NODE_ENV !== 'production') {
-    warning(
-      !onPopupVisibleChange,
-      '`onPopupVisibleChange` is deprecated. Please use `onDropdownVisibleChange` instead.',
-    );
-    warning(popupVisible === undefined, '`popupVisible` is deprecated. Please use `open` instead.');
-    warning(
-      popupClassName === undefined,
-      '`popupClassName` is deprecated. Please use `dropdownClassName` instead.',
-    );
-    warning(
-      popupPlacement === undefined,
-      '`popupPlacement` is deprecated. Please use `placement` instead.',
-    );
-  }
-
   const mergedOpen = open !== undefined ? open : popupVisible;
 
   const mergedDropdownClassName = dropdownClassName || popupClassName;
@@ -439,6 +423,12 @@ const Cascader = React.forwardRef<CascaderRef, InternalCascaderProps>((props, re
     onPopupVisibleChange?.(nextVisible);
   };
 
+  // ========================== Warning ===========================
+  if (process.env.NODE_ENV !== 'production') {
+    warningProps(props);
+    warningNullOptions(mergedOptions, mergedFieldNames);
+  }
+
   // ========================== Context ===========================
   const cascaderContext = React.useMemo(
     () => ({
diff --git a/src/utils/warningPropsUtil.ts b/src/utils/warningPropsUtil.ts
new file mode 100644
index 00000000..2b406996
--- /dev/null
+++ b/src/utils/warningPropsUtil.ts
@@ -0,0 +1,47 @@
+import warning from 'rc-util/lib/warning';
+import type { DefaultOptionType, FieldNames, InternalCascaderProps } from '../Cascader';
+
+function warningProps(props: InternalCascaderProps) {
+  const { onPopupVisibleChange, popupVisible, popupClassName, popupPlacement } = props;
+
+  warning(
+    !onPopupVisibleChange,
+    '`onPopupVisibleChange` is deprecated. Please use `onDropdownVisibleChange` instead.',
+  );
+  warning(popupVisible === undefined, '`popupVisible` is deprecated. Please use `open` instead.');
+  warning(
+    popupClassName === undefined,
+    '`popupClassName` is deprecated. Please use `dropdownClassName` instead.',
+  );
+  warning(
+    popupPlacement === undefined,
+    '`popupPlacement` is deprecated. Please use `placement` instead.',
+  );
+}
+
+// value in Cascader options should not be null
+export function warningNullOptions(options: DefaultOptionType[], fieldNames: FieldNames) {
+  if (options) {
+    const recursiveOptions = (optionsList: DefaultOptionType[]) => {
+      for (let i = 0; i < optionsList.length; i++) {
+        const option = optionsList[i];
+
+        if (option[fieldNames?.value] === null) {
+          warning(false, '`value` in Cascader options should not be `null`.');
+          return true;
+        }
+
+        if (
+          Array.isArray(option[fieldNames?.children]) &&
+          recursiveOptions(option[fieldNames?.children])
+        ) {
+          return true;
+        }
+      }
+    };
+
+    recursiveOptions(options);
+  }
+}
+
+export default warningProps;
diff --git a/tests/fieldNames.spec.tsx b/tests/fieldNames.spec.tsx
index 864c963d..33560b79 100644
--- a/tests/fieldNames.spec.tsx
+++ b/tests/fieldNames.spec.tsx
@@ -135,4 +135,36 @@ describe('Cascader.FieldNames', () => {
 
     expect(wrapper.find('.rc-cascader-menu-item').last().text()).toEqual('Not Found');
   });
+
+  it('`null` is a value in fieldNames options should throw a warning', () => {
+    const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => null);
+    mount(
+      <Cascader
+        fieldNames={fieldNames}
+        options={[
+          {
+            customTitle: '四川',
+            customValue: 'sc',
+            customChildren: [
+              {
+                customTitle: '成都',
+                customValue: 'cd',
+                customChildren: [
+                  {
+                    customTitle: '天府新区',
+                    customValue: null,
+                  },
+                ],
+              },
+            ],
+          },
+        ]}
+      />,
+    );
+
+    expect(errorSpy).toHaveBeenCalledWith(
+      'Warning: `value` in Cascader options should not be `null`.',
+    );
+    errorSpy.mockReset();
+  });
 });
diff --git a/tests/index.spec.tsx b/tests/index.spec.tsx
index 904bf9fa..960e970b 100644
--- a/tests/index.spec.tsx
+++ b/tests/index.spec.tsx
@@ -946,4 +946,35 @@ describe('Cascader.Basic', () => {
   it('not crash when value type is not array', () => {
     mount(<Cascader value={'bamboo' as any} />);
   });
+
+  it('`null` is a value in Cascader options should throw a warning', () => {
+    const errorSpy = jest.spyOn(console, 'error').mockImplementation(() => null);
+    mount(
+      <Cascader
+        options={[
+          {
+            label: '四川',
+            value: 'sc',
+            children: [
+              {
+                label: '成都',
+                value: 'cd',
+                children: [
+                  {
+                    label: '天府新区',
+                    value: null,
+                  },
+                ],
+              },
+            ],
+          },
+        ]}
+      />,
+    );
+
+    expect(errorSpy).toHaveBeenCalledWith(
+      'Warning: `value` in Cascader options should not be `null`.',
+    );
+    errorSpy.mockReset();
+  });
 });