diff --git a/components/Input/__test__/__snapshots__/input.spec.ts.snap b/components/Input/__test__/__snapshots__/input.spec.ts.snap
index b6d8ca25..8da91f59 100644
--- a/components/Input/__test__/__snapshots__/input.spec.ts.snap
+++ b/components/Input/__test__/__snapshots__/input.spec.ts.snap
@@ -1,15 +1,15 @@
 // Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
 
-exports[`Test: KInput > props: attrs 1`] = `"<div class=\\"k-input--base k-input--base__dark  k-input--base__hover k-input--base__focus \\">  <input class=\\"k-input--inner k-input--inner__dark \\" placeholder=\\"\\" type=\\"number\\" strattr=\\"你干嘛,哎哟\\" numattr=\\"8\\" objattr=\\"[object Object]\\" arrattr=\\"i,kun\\"> </div>"`;
+exports[`Test: KInput > props: attrs 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__hover k-input--base__focus\\">  <input class=\\"k-input--inner k-input--inner__dark\\" placeholder=\\"\\" type=\\"number\\" strattr=\\"你干嘛,哎哟\\" numattr=\\"8\\" objattr=\\"[object Object]\\" arrattr=\\"i,kun\\"> </div>"`;
 
-exports[`Test: KInput > props: cls 1`] = `"<div class=\\"k-input--base k-input--base__dark  k-input--base__hover k-input--base__focus ikun\\">  <input class=\\"k-input--inner k-input--inner__dark \\" placeholder=\\"\\"> </div>"`;
+exports[`Test: KInput > props: cls 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__hover k-input--base__focus ikun\\">  <input class=\\"k-input--inner k-input--inner__dark\\" placeholder=\\"\\"> </div>"`;
 
-exports[`Test: KInput > props: disabled 1`] = `"<div class=\\"k-input--base k-input--base__dark k-input--base__disabled k-input--base__disabled__dark k-input--base__hover k-input--base__focus \\">  <input class=\\"k-input--inner k-input--inner__dark k-input--base__disabled k-input--base__disabled__dark\\" disabled=\\"\\" placeholder=\\"\\"> </div>"`;
+exports[`Test: KInput > props: disabled 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__disabled k-input--base__disabled__dark k-input--base__hover k-input--base__focus\\">  <input class=\\"k-input--inner k-input--inner__dark k-input--base__disabled k-input--base__disabled__dark\\" disabled=\\"\\" placeholder=\\"\\"> </div>"`;
 
-exports[`Test: KInput > props: iconPrefix 1`] = `"<div class=\\"k-input--base k-input--base__dark  k-input--base__hover k-input--base__focus \\"> <div role=\\"\\" aria-hidden=\\"true\\" class=\\"k-icon--base k-icon--base__dark  k-input--icon\\"><div class=\\"i-carbon-logo-svelte k-icon-transition \\" style=\\"width: 24px; height: 24px;\\"></div></div> <input class=\\"k-input--inner k-input--inner__dark \\" placeholder=\\"\\"> </div>"`;
+exports[`Test: KInput > props: iconPrefix 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__hover k-input--base__focus\\"> <div role=\\"\\" aria-hidden=\\"true\\" class=\\"k-icon--base k-icon--base__dark  k-input--icon\\"><div class=\\"i-carbon-logo-svelte k-icon-transition \\" style=\\"width: 24px; height: 24px;\\"></div></div> <input class=\\"k-input--inner k-input--inner__dark\\" placeholder=\\"\\"> </div>"`;
 
-exports[`Test: KInput > props: iconSuffix 1`] = `"<div class=\\"k-input--base k-input--base__dark  k-input--base__hover k-input--base__focus \\">  <input class=\\"k-input--inner k-input--inner__dark \\" placeholder=\\"\\"> <div role=\\"\\" aria-hidden=\\"true\\" class=\\"k-icon--base k-icon--base__dark  k-input--icon\\"><div class=\\"i-carbon-search k-icon-transition \\" style=\\"width: 24px; height: 24px;\\"></div></div></div>"`;
+exports[`Test: KInput > props: iconSuffix 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__hover k-input--base__focus\\">  <input class=\\"k-input--inner k-input--inner__dark\\" placeholder=\\"\\"> <div role=\\"\\" aria-hidden=\\"true\\" class=\\"k-icon--base k-icon--base__dark  k-input--icon\\"><div class=\\"i-carbon-search k-icon-transition \\" style=\\"width: 24px; height: 24px;\\"></div></div></div>"`;
 
-exports[`Test: KInput > props: placeholder 1`] = `"<div class=\\"k-input--base k-input--base__dark  k-input--base__hover k-input--base__focus \\">  <input class=\\"k-input--inner k-input--inner__dark \\" placeholder=\\"我见青山多妩媚，料青山见我应如是\\"> </div>"`;
+exports[`Test: KInput > props: placeholder 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__hover k-input--base__focus\\">  <input class=\\"k-input--inner k-input--inner__dark\\" placeholder=\\"我见青山多妩媚，料青山见我应如是\\"> </div>"`;
 
-exports[`Test: KInput > props: value 1`] = `"<div class=\\"k-input--base k-input--base__dark  k-input--base__hover k-input--base__focus \\">  <input class=\\"k-input--inner k-input--inner__dark \\" placeholder=\\"\\"> </div>"`;
+exports[`Test: KInput > props: value 1`] = `"<div class=\\"k-input k-input--base k-input--base__dark k-input--base__hover k-input--base__focus\\">  <input class=\\"k-input--inner k-input--inner__dark\\" placeholder=\\"\\"> </div>"`;
diff --git a/components/Input/__test__/input.bind.value.update.svelte b/components/Input/__test__/input.bind.value.update.svelte
new file mode 100644
index 00000000..68161327
--- /dev/null
+++ b/components/Input/__test__/input.bind.value.update.svelte
@@ -0,0 +1,8 @@
+<script>
+	import KInput from '../src';
+
+	let value = '';
+</script>
+
+<KInput bind:value></KInput>
+<span>{value}</span>
diff --git a/components/Input/__test__/input.spec.ts b/components/Input/__test__/input.spec.ts
index 58cfedb2..3b58ae1f 100644
--- a/components/Input/__test__/input.spec.ts
+++ b/components/Input/__test__/input.spec.ts
@@ -1,7 +1,9 @@
 import { tick } from 'svelte';
 import { afterEach, beforeEach, describe, expect, test, vi } from 'vitest';
+import { fireEvent } from '@testing-library/svelte';
 import KInput from '../src';
 import KInputSlots from './input.slots.svelte';
+import KInputBindValueUpdate from './input.bind.value.update.svelte';
 
 let host: HTMLElement;
 
@@ -257,4 +259,25 @@ describe('Test: KInput', () => {
 		expect(prefixElm).toBeTruthy();
 		expect(suffixElm).toBeTruthy();
 	});
+
+	test('props: bind value be updated in real time', async () => {
+		const instance = new KInputBindValueUpdate({
+			target: host
+		});
+		expect(instance).toBeTruthy();
+
+		const spanElm = host.querySelector('span');
+		expect(spanElm).toBeTruthy();
+		expect(spanElm?.textContent).toBe('');
+
+		const inputElm = host.querySelector('input');
+		expect(inputElm).toBeTruthy();
+
+		await fireEvent.input(inputElm, { target: { value: 'input change' } });
+		await tick();
+
+		expect(inputElm.value).toBe('input change');
+
+		expect(spanElm?.textContent).toBe('input change');
+	});
 });
diff --git a/components/Input/src/index.svelte b/components/Input/src/index.svelte
index 57decc61..fd4606d7 100644
--- a/components/Input/src/index.svelte
+++ b/components/Input/src/index.svelte
@@ -1,53 +1,71 @@
 <script lang="ts">
+	import type { KInputProps } from './types';
 	import { createEventDispatcher } from 'svelte';
 	import { fade } from 'svelte/transition';
 	import { KIcon } from '@ikun-ui/icon';
-	export let iconPrefix = '';
-	export let iconSuffix = '';
-	export let value = '';
-	export let cls = '';
-	export let placeholder = '';
-	export let disabled = false;
-	export let attrs = {};
+	import { createCls, getPrefixCls } from '@ikun-ui/utils';
+
+	export let value: KInputProps['value'] = '';
+	export let placeholder: KInputProps['placeholder'] = '';
+	export let disabled: KInputProps['disabled'] = false;
+	export let iconPrefix: KInputProps['iconPrefix'] = '';
+	export let iconSuffix: KInputProps['iconSuffix'] = '';
+	export let cls: KInputProps['cls'] = '';
+	export let attrs: KInputProps['attrs'] = {};
 	/**
 	 * @internal
 	 */
-	export let isError: boolean = false;
+	export let isError: KInputProps['isError'] = false;
 	/**
 	 * @internal
 	 */
-	export let errorMsg: string = '';
+	export let errorMsg: KInputProps['errorMsg'] = '';
+
 	const dispatch = createEventDispatcher();
-	const onUpdated = (e: Event) => {
+
+	const onInput = (e: InputEvent) => {
 		if (disabled) return;
 		dispatch('input', (e.target as HTMLInputElement).value);
 	};
+
+	const onChange = (e: Event) => {
+		if (disabled) return;
+		dispatch('change', e);
+	};
+
 	const onEnter = (e: KeyboardEvent) => {
 		if (disabled) return;
 		if (e.key === 'Enter') dispatch('enter', e);
 		else dispatch('keydown', e);
 	};
-	const onChange = (e: Event) => {
-		if (disabled) return;
-		dispatch('change', e);
-	};
-	let valueInner = value;
+
+	// class names
+	const prefixCls = getPrefixCls('input');
+	$: baseCls = createCls(
+		prefixCls,
+		`${prefixCls}--base`,
+		`${prefixCls}--base__dark`,
+		{
+			[`${prefixCls}--base__disabled`]: disabled,
+			[`${prefixCls}--base__disabled__dark`]: disabled
+		},
+		{
+			[`${prefixCls}--base__error`]: isError,
+			[`${prefixCls}--base__hover`]: !isError,
+			[`${prefixCls}--base__focus`]: !isError
+		},
+		cls
+	);
+	$: errorMsgCls = createCls(`${prefixCls}--base__msg__error`);
+	$: inputCls = createCls(`${prefixCls}--inner`, `${prefixCls}--inner__dark`, {
+		[`${prefixCls}--base__disabled`]: disabled,
+		[`${prefixCls}--base__disabled__dark`]: disabled
+	});
 </script>
 
-<div
-	class="
-	k-input--base
-	k-input--base__dark
-	{disabled ? 'k-input--base__disabled k-input--base__disabled__dark' : ''}
-	{isError ? 'k-input--base__error' : 'k-input--base__hover k-input--base__focus'}
-	{cls}"
->
+<div class={baseCls}>
 	{#if isError}
-		<span
-			out:fade={{ duration: 200 }}
-			in:fade={{ duration: 200 }}
-			class="k-input--base__msg__error"
-		>
+		<span class={errorMsgCls} transition:fade={{ duration: 200 }}>
 			{errorMsg}
 		</span>
 	{/if}
@@ -57,12 +75,10 @@
 		{/if}
 	</slot>
 	<input
-		class="k-input--inner k-input--inner__dark {disabled
-			? 'k-input--base__disabled k-input--base__disabled__dark'
-			: ''}"
-		bind:value={valueInner}
+		class={inputCls}
+		bind:value
 		{disabled}
-		on:input={onUpdated}
+		on:input={onInput}
 		on:change={onChange}
 		on:keydown={onEnter}
 		{placeholder}
diff --git a/components/Input/src/types.d.ts b/components/Input/src/types.d.ts
index 1a25456a..561e04c5 100644
--- a/components/Input/src/types.d.ts
+++ b/components/Input/src/types.d.ts
@@ -1 +1,12 @@
 /// <reference types="svelte" />
+export type KInputProps = {
+	value: string;
+	placeholder: string;
+	disabled: boolean;
+	iconPrefix: string;
+	iconSuffix: string;
+	isError: boolean;
+	errorMsg: string;
+	cls: string;
+	attrs: Record<string, string>;
+};
diff --git a/play/src/routes/+page.svelte b/play/src/routes/+page.svelte
index 099568e0..bfda4e6d 100644
--- a/play/src/routes/+page.svelte
+++ b/play/src/routes/+page.svelte
@@ -63,29 +63,39 @@
 	const spinOptions = {
 		show: false,
 		text: 'loading...',
-    fullScreen: true
+		fullScreen: true
 	};
 
-
 	const handleToggleSpin = () => {
 		spinOptions.show = !spinOptions.show;
 	};
 
-
-    $: breadcrumbList = [
-        { label: 'home', href: '/' },
-        { label: 'breadcrumb', href: '' }
-    ];
-    const addBreadcrumb = () => {
-        breadcrumbList.push({ label: 'test', href: '' });
-        breadcrumbList = breadcrumbList;
-    };
-    const delBreadcrumb = () => {
-        breadcrumbList.pop();
-        breadcrumbList = breadcrumbList;
-    };
+	$: breadcrumbList = [
+		{ label: 'home', href: '/' },
+		{ label: 'breadcrumb', href: '' }
+	];
+	const addBreadcrumb = () => {
+		breadcrumbList.push({ label: 'test', href: '' });
+		breadcrumbList = breadcrumbList;
+	};
+	const delBreadcrumb = () => {
+		breadcrumbList.pop();
+		breadcrumbList = breadcrumbList;
+	};
 </script>
 
+<div class="my-10px">
+	<div class="my-10px">KInput</div>
+	<KInput
+		bind:value={inputValue}
+		placeholder="inputValue"
+		iconPrefix="i-carbon-settings"
+		on:input={() => {
+			console.log('on:input =>', inputValue);
+		}}
+	></KInput>
+</div>
+
 <div class="my-10px">
 	<div class="mb-10px">Breadcrumb</div>
 	<KBreadcrumb separator="/">
@@ -140,8 +150,6 @@
 	<KButton type="primary" on:click={() => open()}>KEyeDropper</KButton>
 </KEyeDropper>
 
-<KInput value={inputValue} placeholder="inputValue" iconPrefix="i-carbon-settings"></KInput>
-
 <KTooltip content="KTooltip - content" placement="bottom">
 	<KButton type="warning" slot="triggerEl">KTooltip - trigger</KButton>
 </KTooltip>
@@ -214,4 +222,4 @@
 <KButton on:click={handleToggleSpin}>ToggleSpin</KButton>
 <div use:KSpin={spinOptions} class="w-200px h-50px bg-red"></div>
 
-<KBacktop bottom="{100}" right="{100}" show-height="100"/>
+<KBacktop bottom={100} right={100} show-height="100" />