diff --git a/formkit.config.ts b/formkit.config.ts
index 744acfe..f9cfe62 100644
--- a/formkit.config.ts
+++ b/formkit.config.ts
@@ -15,6 +15,7 @@ import type { App } from 'vue';
 import { addAsteriskPlugin } from './formkit.config.plugin.addAsteriskPlugin';
 import { debugPlugin } from './formkit.config.plugin.debug';
 import { PDatePicker } from '@/__fk-inputs__/inputs/p-date-picker';
+import { PCascadeSelect } from '@/__fk-inputs__/inputs/p-cascade-select';
 
 const plugins: FormKitPlugin[] = [
   // createLibraryPlugin(fkLibrary),
@@ -28,6 +29,7 @@ const plugins: FormKitPlugin[] = [
     PInputPassword,
     PSelect,
     PDatePicker,
+    PCascadeSelect,
   }),
   // createLibraryPlugin(
   //   {
diff --git a/package.json b/package.json
index c0a7d44..c3c2de1 100644
--- a/package.json
+++ b/package.json
@@ -30,6 +30,7 @@
     "primevue": "^4.2.5",
     "sweetalert2": "^11.15.3",
     "tailwindcss": "^3.4.17",
+    "utils4u": "^2.19.2",
     "vue": "^3.5.13",
     "zod-i18n-map": "^2.27.0"
   },
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index c55a435..b3dd17c 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -65,6 +65,9 @@ importers:
       tailwindcss:
         specifier: ^3.4.17
         version: 3.4.17
+      utils4u:
+        specifier: ^2.19.2
+        version: 2.19.2
       vue:
         specifier: ^3.5.13
         version: 3.5.13(typescript@5.7.2)
@@ -1296,8 +1299,8 @@ packages:
     resolution: {integrity: sha512-oX2ruAFQwf/Orj8m737Y5adxDQO0LAB7/S5MnxCdTNDd4p6BsyIVsv9JQsATbTSq8KHRpLwIHbVlUNatxd+1Ow==}
     engines: {node: '>=8.6.0'}
 
-  fastq@1.17.1:
-    resolution: {integrity: sha512-sRVD3lWVIXWg6By68ZN7vho9a1pQcN/WBFaAAsDDFzlJjvoGx0P8z7V1t72grFJfJhu3YPZBuu25f7Kaw2jN1w==}
+  fastq@1.18.0:
+    resolution: {integrity: sha512-QKHXPW0hD8g4UET03SdOdunzSouc9N4AuHdsX8XNcTsuz+yYFILVNIX4l9yHABMhiEI9Db0JTTIpu0wB+Y1QQw==}
 
   fdir@6.4.2:
     resolution: {integrity: sha512-KnhMXsKSPZlAhp7+IjUkRZKPb4fUyccpDrdFXbi4QL1qkmFh9kVY09Yox+n4MaOb3lHZ1Tv829C3oaaXoMYPDQ==}
@@ -1800,6 +1803,9 @@ packages:
   util-deprecate@1.0.2:
     resolution: {integrity: sha512-EPD5q1uXyFxJpCrLnCc1nHnq3gOa6DZBocAIiI2TaSCA7VCJ1UJDMagCzIkXNsUYfD1daK//LTEQ8xiIbrHtcw==}
 
+  utils4u@2.19.2:
+    resolution: {integrity: sha512-QjnPId4oadpieslF4SxxXHOxGJKG5xFlY/GqJS4a/1tUUDlC3AoMWksmXaX4FWO9AVANn5qgy5tLuYgS+VndRw==}
+
   vite@6.0.5:
     resolution: {integrity: sha512-akD5IAH/ID5imgue2DYhzsEwCi0/4VKY31uhMLEYJwPP4TiUp8pL5PIK+Wo7H8qT8JY9i+pVfPydcFPYD1EL7g==}
     engines: {node: ^18.0.0 || ^20.0.0 || >=22.0.0}
@@ -2448,7 +2454,7 @@ snapshots:
   '@nodelib/fs.walk@1.2.8':
     dependencies:
       '@nodelib/fs.scandir': 2.1.5
-      fastq: 1.17.1
+      fastq: 1.18.0
 
   '@pkgjs/parseargs@0.11.0':
     optional: true
@@ -3078,7 +3084,7 @@ snapshots:
       merge2: 1.4.1
       micromatch: 4.0.8
 
-  fastq@1.17.1:
+  fastq@1.18.0:
     dependencies:
       reusify: 1.0.4
 
@@ -3591,6 +3597,8 @@ snapshots:
 
   util-deprecate@1.0.2: {}
 
+  utils4u@2.19.2: {}
+
   vite@6.0.5(jiti@2.4.2)(tsx@4.19.2)(yaml@2.6.1):
     dependencies:
       esbuild: 0.24.0
diff --git a/src/App.vue b/src/App.vue
index 1805b93..df30207 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -4,13 +4,81 @@ import AllCustom from './all-custom/all-custom.vue';
 import TutorialForm from './tutorial-form/index.vue';
 import ZodForm from './zod-form/index.vue';
 
-const datetime12h = ref();
-const datetime24h = ref();
-const time = ref();
-const date = ref();
-const dates = ref();
-
-
+const selectedCity = ref();
+const countries = ref([
+  {
+    name: 'Australia',
+    code: 'AU',
+    states: [
+      {
+        name: 'New South Wales',
+        cities: [
+          { cname: 'Sydney', code: 'A-SY' },
+          { cname: 'Newcastle', code: 'A-NE' },
+          { cname: 'Wollongong', code: 'A-WO' }
+        ]
+      },
+      {
+        name: 'Queensland',
+        cities: [
+          { cname: 'Brisbane', code: 'A-BR' },
+          { cname: 'Townsville', code: 'A-TO' }
+        ]
+      }
+    ]
+  },
+  {
+    name: 'Canada',
+    code: 'CA',
+    states: [
+      {
+        name: 'Quebec',
+        cities: [
+          { cname: 'Montreal', code: 'C-MO' },
+          { cname: 'Quebec City', code: 'C-QU' }
+        ]
+      },
+      {
+        name: 'Ontario',
+        cities: [
+          { cname: 'Ottawa', code: 'C-OT' },
+          { cname: 'Toronto', code: 'C-TO' }
+        ]
+      }
+    ]
+  },
+  {
+    name: 'United States',
+    code: 'US',
+    states: [
+      {
+        name: 'California',
+        cities: [
+          { cname: 'Los Angeles', code: 'US-LA' },
+          { cname: 'San Diego', code: 'US-SD' },
+          { cname: 'San Francisco', code: 'US-SF' }
+        ]
+      },
+      {
+        name: 'Florida',
+        cities: [
+          { cname: 'Jacksonville', code: 'US-JA' },
+          { cname: 'Miami', code: 'US-MI' },
+          { cname: 'Tampa', code: 'US-TA' },
+          { cname: 'Orlando', code: 'US-OR' }
+        ]
+      },
+      {
+        name: 'Texas',
+        cities: [
+          { cname: 'Austin', code: 'US-AU' },
+          { cname: 'Dallas', code: 'US-DA' },
+          { cname: 'Houston', code: 'US-HO' }
+        ]
+      }
+    ]
+  }
+]);
 </script>
 
 <template>
@@ -26,60 +94,16 @@ const dates = ref();
 
     <div class="p-4 w-full bg-white rounded-lg shadow-md dark:bg-gray-800 dark:text-white mt-4">
 
-
-      <div class="card flex flex-wrap gap-4 items-start">
-        <DatePicker
-          v-model="date"
-          view="month"
-          dateFormat="mm/yy"
-        />
-
-        <DatePicker
-          v-model="dates"
-          selectionMode="range"
-          :manualInput="false"
-        />
-
-
-        <div class="flex-auto">
-          <label
-            for="datepicker-12h"
-            class="font-bold block mb-2"
-          > 12h Format </label>
-          <DatePicker
-            id="datepicker-12h"
-            v-model="datetime12h"
-            showTime
-            hourFormat="12"
-            fluid
-          />
-        </div>
-        <div class="flex-auto">
-          <label
-            for="datepicker-24h"
-            class="font-bold block mb-2"
-          > 24h Format </label>
-          <DatePicker
-            id="datepicker-24h"
-            v-model="datetime24h"
-            showTime
-            hourFormat="24"
-            fluid
-          />
-        </div>
-        <div class="flex-auto">
-          <label
-            for="datepicker-timeonly"
-            class="font-bold block mb-2"
-          > Time Only </label>
-          <DatePicker
-            id="datepicker-timeonly"
-            v-model="time"
-            timeOnly
-            fluid
-          />
-        </div>
-      </div>
+      <CascadeSelect
+        loading
+        v-model="selectedCity"
+        :options="countries"
+        optionLabel="cname"
+        optionGroupLabel="name"
+        :optionGroupChildren="['states', 'cities']"
+        class="w-56"
+        placeholder="Select a City"
+      />
 
     </div>
   </div>
diff --git a/src/__fk-inputs__/inputs/p-cascade-select.tsx b/src/__fk-inputs__/inputs/p-cascade-select.tsx
new file mode 100644
index 0000000..c48dab1
--- /dev/null
+++ b/src/__fk-inputs__/inputs/p-cascade-select.tsx
@@ -0,0 +1,113 @@
+import type { FormKitFrameworkContext, FormKitTypeDefinition } from '@formkit/core';
+import type { FormKitInputs } from '@formkit/inputs';
+import { createSection, label, outer } from '@formkit/inputs';
+import type { CascadeSelectEmitsOptions, CascadeSelectProps } from 'primevue/cascadeselect';
+import PrimevueCascadeselect from 'primevue/cascadeselect';
+import { defineComponent, markRaw, ref } from 'vue';
+import { floatLabel } from '../sections/floatLabel';
+import { messages } from '../sections/messages';
+
+// https://formkit.com/inputs/dropdown
+
+type PrimevueSelectListeners = {
+  'onUpdate:modelValue': CascadeSelectEmitsOptions['update:modelValue'];
+  'onBlur': CascadeSelectEmitsOptions['blur'];
+};
+
+const SchemaComponent = defineComponent(
+  (vueProps: { context: FormKitFrameworkContext }) => {
+    const formkitContext = vueProps.context;
+    const listeners: PrimevueSelectListeners = {
+      'onUpdate:modelValue': (value: unknown) => {
+        formkitContext.node.input(value);
+      },
+      'onBlur': async e => {
+        setTimeout(
+          () => formkitContext.handlers.blur.call(undefined, e as never),
+          166, // 因为会触发两次。所以让blur事件延迟一点，可以考虑优化。（Cascadeselect好像没有这个问题）
+        );
+      },
+    };
+    const p_options = ref();
+    const loading = ref(true);
+
+    const loadOptions = async () => {
+      try {
+        let result;
+        if (formkitContext.options instanceof Promise) {
+          result = await formkitContext.options;
+        } else {
+          console.warn('未支持的 options 类型 :>> ', typeof formkitContext.options);
+        }
+        p_options.value = result;
+      } catch (error) {
+        console.error('Failed to load options:', error);
+        p_options.value = [];
+      } finally {
+        loading.value = false;
+      }
+    };
+
+    loadOptions(); // 立即加载options
+
+    return () => {
+      return (
+        <PrimevueCascadeselect
+          inputId={formkitContext.id}
+          optionLabel={formkitContext.optionLabel as never}
+          optionValue={formkitContext.optionValue as never}
+          optionGroupChildren={(formkitContext.optionGroupChildren as never) || 'children'}
+          optionGroupLabel={(formkitContext.optionGroupLabel as never) || (formkitContext.optionLabel as never)}
+          loading={loading.value}
+          options={p_options.value}
+          invalid={formkitContext.state.invalid}
+          fluid
+          disabled={!!formkitContext.disabled}
+          modelValue={formkitContext._value}
+          {...listeners}
+        />
+      );
+    };
+  },
+  // https://cn.vuejs.org/api/general#definecomponent
+  // 目前仍然需要手动声明运行时的 props
+  // 在将来，我们计划提供一个 Babel 插件，自动推断并注入运行时 props (就像在单文件组件中的 defineProps 一样)，以便省略运行时 props 的声明。
+  {
+    props: ['context'],
+  },
+);
+
+const input = createSection('input', () => ({
+  $cmp: markRaw(SchemaComponent) as never,
+  bind: '$attrs',
+  props: {
+    context: '$node.context',
+  },
+}));
+
+export const PCascadeSelect: FormKitTypeDefinition = {
+  type: 'input',
+  schema: outer(
+    floatLabel(
+      input(), //
+      label('$label'),
+    ),
+    messages(),
+  ),
+  props: ['options', 'optionLabel', 'optionValue'],
+  // schemaMemoKey: '72psvunq45', // Math.random().toString(36).substring(2, 15)
+};
+
+type OptionsType = CascadeSelectProps['options'];
+
+declare module '@formkit/inputs' {
+  // https://formkit.com/essentials/custom-inputs#typescript-support
+  interface FormKitInputProps<Props extends FormKitInputs<Props>> {
+    PCascadeSelect: {
+      type: 'PCascadeSelect';
+      options: Promise<OptionsType>;
+      optionLabel: string;
+      optionValue: string;
+    };
+  }
+}
diff --git a/src/__fk-inputs__/inputs/p-select.tsx b/src/__fk-inputs__/inputs/p-select.tsx
index e700e3f..9604656 100644
--- a/src/__fk-inputs__/inputs/p-select.tsx
+++ b/src/__fk-inputs__/inputs/p-select.tsx
@@ -32,7 +32,7 @@ const SchemaComponent = defineComponent(
     };
     // [optionsLoader](https://github.com/formkit/formkit/blob/2d5387ba98597775cb2a752af65aee84bc438863/packages/inputs/src/features/options.ts#L125)
 
-    const poptions = ref();
+    const p_options = ref();
     const loading = ref(true);
 
     const loadOptions = async () => {
@@ -46,10 +46,10 @@ const SchemaComponent = defineComponent(
         } else {
           result = formkitContext.options;
         }
-        poptions.value = result;
+        p_options.value = result;
       } catch (error) {
         console.error('Failed to load options:', error);
-        poptions.value = [];
+        p_options.value = [];
       } finally {
         loading.value = false;
       }
@@ -76,7 +76,7 @@ const SchemaComponent = defineComponent(
           invalid={formkitContext.state.invalid || valueSlot.value !== undefined}
           disabled={!!formkitContext.disabled}
           loading={loading.value}
-          options={poptions.value}
+          options={p_options.value}
           modelValue={formkitContext._value}
           optionLabel={formkitContext.optionLabel as never}
           optionValue={formkitContext.optionValue as never}
diff --git a/src/all-custom/all-custom.vue b/src/all-custom/all-custom.vue
index b472e8c..0a4b5e6 100644
--- a/src/all-custom/all-custom.vue
+++ b/src/all-custom/all-custom.vue
@@ -3,6 +3,7 @@ import { FormKitNode } from '@formkit/core';
 import { text } from '@formkit/inputs';
 import Swal from 'sweetalert2';
 import dayjs from 'dayjs';
+import { arrayToTree } from 'utils4u/array';
 
 async function submit(formData: Record<string, any>, formNode: FormKitNode) {
   console.group('submit');
@@ -27,6 +28,44 @@ const K_OPTIONS = [
 const promiseOptions = new Promise<typeof K_OPTIONS>(resolve => {
   setTimeout(() => resolve(K_OPTIONS), 1000);
 });
+
+const K_FLAT_TREE = [
+  {
+    dictLabel: '北京市',
+    dictValue: '110000',
+    fullName: '北京市',
+    abbrName: '北京',
+    dictParent: '00',
+  },
+  {
+    dictLabel: '山西省',
+    dictValue: '140000',
+    fullName: '山西省',
+    abbrName: '山西',
+    dictParent: '00',
+  },
+  {
+    dictLabel: '太原市',
+    dictValue: '140100',
+    fullName: '山西省,太原市',
+    abbrName: '山西太原',
+    dictParent: '140000',
+  },
+  {
+    dictLabel: '大同市',
+    dictValue: '140200',
+    fullName: '山西省,大同市',
+    abbrName: '山西大同',
+    dictParent: '140000',
+  },
+]
+
+
+const promiseCascadeOptions = new Promise<typeof K_FLAT_TREE>((resolve) => {
+  setTimeout(() => {
+    resolve(arrayToTree(K_FLAT_TREE, { id: 'dictValue', parentId: 'dictParent', rootId: '00' }));
+  }, 1000);
+});
 /* const funcOptions = async () => {
   await new Promise(r => setTimeout(r, 1000))
   return K_OPTIONS;
@@ -99,6 +138,15 @@ const promiseOptions = new Promise<typeof K_OPTIONS>(resolve => {
         optionLabel="label"
         optionValue="value"
       />
+      <FormKit
+        type="PCascadeSelect"
+        name="PCascadeSelect"
+        label="级联选择框"
+        validation="required"
+        :options="promiseCascadeOptions"
+        optionLabel="dictLabel"
+        optionValue="dictValue"
+      />
       <FormKit
         type="PDatePicker"
         name="PDatePicker"