diff --git a/src/components/chat-view/ChatHistoryView.tsx b/src/components/chat-view/ChatHistoryView.tsx
index 3fa63cf..27e6ae6 100644
--- a/src/components/chat-view/ChatHistoryView.tsx
+++ b/src/components/chat-view/ChatHistoryView.tsx
@@ -1,4 +1,4 @@
-import { CheckSquare, Clock, Edit3, MessageSquare, Pencil, Search, Square, Trash2, CopyPlus } from 'lucide-react'
+import { CheckSquare, Clock, CopyPlus, MessageSquare, Pencil, Search, Sparkles, Square, Trash2 } from 'lucide-react'
 import { Notice } from 'obsidian'
 import React, { useMemo, useRef, useState } from 'react'
 
@@ -23,6 +23,7 @@ const ChatHistoryView = ({
 		deleteConversation,
 		updateConversationTitle,
 		chatList,
+		cleanupOutdatedChats,
 	} = useChatHistory()
 
 	// search term
@@ -37,6 +38,25 @@ const ChatHistoryView = ({
 
 	const titleInputRefs = useRef<Map<string, HTMLInputElement>>(new Map())
 
+	const handleCleanup = async () => {
+		const confirmed = confirm('此操作将永久删除所有对话的历史版本，只保留最新版。这有助于清理数据，但操作不可撤销。确定要继续吗？')
+		if (!confirmed) {
+			return
+		}
+
+		try {
+			const count = await cleanupOutdatedChats()
+			if (count > 0) {
+				new Notice(`成功清理了 ${count} 个过时的对话文件。`)
+			} else {
+				new Notice('没有需要清理的对话文件。')
+			}
+		} catch (error) {
+			new Notice('清理失败，请检查开发者控制台获取更多信息。')
+			console.error('Failed to cleanup outdated chats', error)
+		}
+	}
+
 	// handle search
 	const handleSearch = (e: React.ChangeEvent<HTMLInputElement>) => {
 		setSearchTerm(e.target.value)
@@ -192,6 +212,14 @@ const ChatHistoryView = ({
 					<h2>{t('chat.history.title')}</h2>
 				</div>
 				<div className="infio-chat-history-header-actions">
+					<button
+						onClick={handleCleanup}
+						className="infio-chat-history-cleanup-btn"
+						title={'清理历史版本'}
+					>
+						<Sparkles size={16} />
+						清理
+					</button>
 					<button
 						onClick={toggleSelectionMode}
 						className={`infio-chat-history-selection-btn ${selectionMode ? 'active' : ''}`}
@@ -398,6 +426,7 @@ const ChatHistoryView = ({
 					flex-shrink: 0;
 				}
 
+				.infio-chat-history-cleanup-btn,
 				.infio-chat-history-selection-btn {
 					display: flex !important;
 					align-items: center;
@@ -415,6 +444,7 @@ const ChatHistoryView = ({
 					box-sizing: border-box;
 				}
 
+				.infio-chat-history-cleanup-btn:hover,
 				.infio-chat-history-selection-btn:hover {
 					background-color: var(--background-modifier-hover, #f5f5f5);
 					border-color: var(--background-modifier-border-hover, #d0d0d0);
diff --git a/src/database/json/chat/ChatManager.ts b/src/database/json/chat/ChatManager.ts
index 460778a..743c808 100644
--- a/src/database/json/chat/ChatManager.ts
+++ b/src/database/json/chat/ChatManager.ts
@@ -71,11 +71,15 @@ export class ChatManager extends AbstractJsonRepository<
 
 	public async findById(id: string): Promise<ChatConversation | null> {
 		const allMetadata = await this.listMetadata()
-		const targetMetadata = allMetadata.find((meta) => meta.id === id)
+		const targetMetadatas = allMetadata.filter((meta) => meta.id === id)
 
-		if (!targetMetadata) return null
+		if (targetMetadatas.length === 0) return null
 
-		return this.read(targetMetadata.fileName)
+		// Sort by updatedAt descending to find the latest version
+		targetMetadatas.sort((a, b) => b.updatedAt - a.updatedAt)
+		const latestMetadata = targetMetadatas[0]
+
+		return this.read(latestMetadata.fileName)
 	}
 
 	public async updateChat(
@@ -103,16 +107,65 @@ export class ChatManager extends AbstractJsonRepository<
 
 	public async deleteChat(id: string): Promise<boolean> {
 		const allMetadata = await this.listMetadata()
-		const targetMetadata = allMetadata.find((meta) => meta.id === id)
-		if (!targetMetadata) return false
+		const targetsToDelete = allMetadata.filter((meta) => meta.id === id)
+
+		if (targetsToDelete.length === 0) return false
+
+		// Delete all files associated with this ID
+		await Promise.all(targetsToDelete.map(meta => this.delete(meta.fileName)))
 
-		await this.delete(targetMetadata.fileName)
 		return true
 	}
 
+	public async cleanupOutdatedChats(): Promise<number> {
+		const allMetadata = await this.listMetadata()
+		const chatsById = new Map<string, (ChatConversationMeta & { fileName: string })[]>()
+
+		// Group chats by ID
+		for (const meta of allMetadata) {
+			if (!chatsById.has(meta.id)) {
+				chatsById.set(meta.id, [])
+			}
+			chatsById.get(meta.id)!.push(meta)
+		}
+
+		const filesToDelete: string[] = []
+
+		// Find outdated files for each ID
+		for (const chatGroup of chatsById.values()) {
+			if (chatGroup.length > 1) {
+				// Sort by date to find the newest
+				chatGroup.sort((a, b) => b.updatedAt - a.updatedAt)
+				// The first one is the latest, the rest are outdated
+				const outdatedFiles = chatGroup.slice(1)
+				for (const outdated of outdatedFiles) {
+					filesToDelete.push(outdated.fileName)
+				}
+			}
+		}
+
+		if (filesToDelete.length > 0) {
+			await Promise.all(filesToDelete.map(fileName => this.delete(fileName)))
+		}
+
+		return filesToDelete.length
+	}
+
 	public async listChats(): Promise<ChatConversationMeta[]> {
 		const metadata = await this.listMetadata()
-		const sorted = metadata.sort((a, b) => b.updatedAt - a.updatedAt)
+
+		// Use a Map to store the latest version of each chat by ID.
+		const latestChats = new Map<string, ChatConversationMeta>()
+
+		for (const meta of metadata) {
+			const existing = latestChats.get(meta.id)
+			if (!existing || meta.updatedAt > existing.updatedAt) {
+				latestChats.set(meta.id, meta)
+			}
+		}
+
+		const uniqueMetadata = Array.from(latestChats.values())
+		const sorted = uniqueMetadata.sort((a, b) => b.updatedAt - a.updatedAt)
 		return sorted
 	}
 }
diff --git a/src/hooks/use-chat-history.ts b/src/hooks/use-chat-history.ts
index d4d1d9b..cf28bb3 100644
--- a/src/hooks/use-chat-history.ts
+++ b/src/hooks/use-chat-history.ts
@@ -17,6 +17,7 @@ type UseChatHistory = {
 	getChatMessagesById: (id: string) => Promise<ChatMessage[] | null>
 	updateConversationTitle: (id: string, title: string) => Promise<void>
 	chatList: ChatConversationMeta[]
+	cleanupOutdatedChats: () => Promise<number>
 }
 
 export function useChatHistory(): UseChatHistory {
@@ -111,11 +112,18 @@ export function useChatHistory(): UseChatHistory {
 		[chatManager, fetchChatList],
 	)
 
+	const cleanupOutdatedChats = useCallback(async (): Promise<number> => {
+		const count = await chatManager.cleanupOutdatedChats()
+		await fetchChatList()
+		return count
+	}, [chatManager, fetchChatList])
+
 	return {
 		createOrUpdateConversation,
 		deleteConversation,
 		getChatMessagesById,
 		updateConversationTitle,
 		chatList,
+		cleanupOutdatedChats,
 	}
 }