diff --git a/backend/internal/api/handlers/llm.go b/backend/internal/api/handlers/llm.go
index 6961635..8b3287a 100644
--- a/backend/internal/api/handlers/llm.go
+++ b/backend/internal/api/handlers/llm.go
@@ -9,6 +9,7 @@ import (
 	"strings"
 	"time"
 
+	"ezops/internal/api/middleware"
 	"ezops/internal/models"
 
 	"github.com/gin-gonic/gin"
@@ -235,9 +236,23 @@ func (h *LLMHandler) Chat(c *gin.Context) {
 		c.JSON(http.StatusOK, models.Response{Code: 500, Message: "解析 LLM 响应失败"})
 		return
 	}
+	replyContent := chatResp.Choices[0].Message.Content
+
+	// 持久化对话历史（按用户隔离，成对写入 user + assistant） // Logan.Li
+	// 仅在成功时入库；错误气泡为瞬时 UI 不持久化
+	uid := middleware.GetUserID(c)
+	if uid != 0 && len(req.Messages) > 0 {
+		// 取最后一条用户消息（前端已附加当前提问）
+		lastUser := req.Messages[len(req.Messages)-1]
+		now := time.Now()
+		h.db.Create(&[]models.ChatHistory{
+			{UserID: uid, Role: "user", Content: lastUser.Content, CreatedAt: now},
+			{UserID: uid, Role: "assistant", Content: replyContent, Model: cfg.Model, CreatedAt: now.Add(time.Millisecond)},
+		})
+	}
 
 	c.JSON(http.StatusOK, models.Response{Code: 200, Data: models.ChatResponse{
-		Content:    chatResp.Choices[0].Message.Content,
+		Content:    replyContent,
 		Model:      cfg.Model,
 		TokensUsed: chatResp.Usage.TotalTokens,
 	}})
@@ -292,3 +307,34 @@ func (h *LLMHandler) TestLLMConnection(c *gin.Context) {
 	}
 	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "连接成功"})
 }
+
+// GetChatHistory 获取当前用户的对话历史（按时间正序，仅返回最近 100 条避免过大） // Logan.Li
+// GET /api/v1/aiops/chat-history
+func (h *LLMHandler) GetChatHistory(c *gin.Context) {
+	uid := middleware.GetUserID(c)
+	var rows []models.ChatHistory
+	// 子查询取最近 100 条后再正序返回，保证前端渲染顺序正确 // Logan.Li
+	h.db.Where("user_id = ?", uid).
+		Order("id DESC").
+		Limit(100).
+		Find(&rows)
+	// 反转为时间正序（最早在前）
+	for i, j := 0, len(rows)-1; i < j; i, j = i+1, j-1 {
+		rows[i], rows[j] = rows[j], rows[i]
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Data: gin.H{
+		"list":  rows,
+		"total": len(rows),
+	}})
+}
+
+// ClearChatHistory 清空当前用户的对话历史 // Logan.Li
+// DELETE /api/v1/aiops/chat-history
+func (h *LLMHandler) ClearChatHistory(c *gin.Context) {
+	uid := middleware.GetUserID(c)
+	if err := h.db.Where("user_id = ?", uid).Delete(&models.ChatHistory{}).Error; err != nil {
+		c.JSON(http.StatusInternalServerError, models.Response{Code: 500, Message: "清除失败: " + err.Error()})
+		return
+	}
+	c.JSON(http.StatusOK, models.Response{Code: 200, Message: "对话历史已清空"})
+}
diff --git a/backend/internal/api/routes/routes.go b/backend/internal/api/routes/routes.go
index b03c308..52ab525 100644
--- a/backend/internal/api/routes/routes.go
+++ b/backend/internal/api/routes/routes.go
@@ -421,6 +421,8 @@ func Register(r *gin.Engine, db *gorm.DB, log *zap.Logger, cfg *config.Config) {
 		aiopsGroup.PUT("/llm-config", llmHandler.SaveLLMConfig)
 		aiopsGroup.POST("/llm-config/test", llmHandler.TestLLMConnection)
 		aiopsGroup.POST("/chat", llmHandler.Chat)
+		aiopsGroup.GET("/chat-history", llmHandler.GetChatHistory)
+		aiopsGroup.DELETE("/chat-history", llmHandler.ClearChatHistory)
 	}
 
 	// 启动告警引擎（每 30 秒检查一次）
diff --git a/backend/internal/models/llm.go b/backend/internal/models/llm.go
index 87d2931..ad9d6b6 100644
--- a/backend/internal/models/llm.go
+++ b/backend/internal/models/llm.go
@@ -50,3 +50,17 @@ type ChatResponse struct {
 	Model      string `json:"model"`
 	TokensUsed int    `json:"tokens_used"`
 }
+
+// ChatHistory 对话历史记录（按用户隔离） // Logan.Li
+// 仅持久化成功完成的对话（用户消息 + 助手回复成对写入），错误气泡为瞬时 UI 不入库
+type ChatHistory struct {
+	ID        uint      `gorm:"primarykey" json:"id"`
+	UserID    uint      `gorm:"index;not null" json:"user_id"`        // 所属用户（JWT 中间件注入）
+	Role      string    `gorm:"size:16;not null" json:"role"`         // user / assistant
+	Content   string    `gorm:"type:text;not null" json:"content"`    // 消息内容
+	Model     string    `gorm:"size:100" json:"model"`                // 生成回复所用模型（仅 assistant 行有意义）
+	CreatedAt time.Time `json:"created_at"`
+}
+
+// TableName 表名 // Logan.Li
+func (ChatHistory) TableName() string { return "chat_histories" }
diff --git a/backend/pkg/database/database.go b/backend/pkg/database/database.go
index b909561..02e25c4 100644
--- a/backend/pkg/database/database.go
+++ b/backend/pkg/database/database.go
@@ -103,5 +103,6 @@ func AutoMigrate(db *gorm.DB) error {
 		&models.TopologyLayout{},        // 拓扑布局保存 // Logan.Li
 		&models.TerminalSession{},       // 终端会话录制（终端审计） // Logan.Li
 		&models.LLMConfig{},             // 大语言模型配置（AI 智能助手） // Logan.Li
+		&models.ChatHistory{},           // 对话历史记录（按用户隔离） // Logan.Li
 	)
 }
diff --git a/frontend/src/components/aiops/AIOpsAssistant.tsx b/frontend/src/components/aiops/AIOpsAssistant.tsx
index 5dc740b..2bf6895 100644
--- a/frontend/src/components/aiops/AIOpsAssistant.tsx
+++ b/frontend/src/components/aiops/AIOpsAssistant.tsx
@@ -23,7 +23,7 @@ import {
 } from '@/components/ui/select';
 import { Switch } from '@/components/ui/switch';
 import { toast } from 'sonner';
-import { aiApi, type LLMConfigData } from '@/services/api';
+import { aiApi, type LLMConfigData, type ChatHistoryItem } from '@/services/api';
 import {
   Bot,
   Send,
@@ -110,7 +110,28 @@ export function AIOpsAssistant() {
       setConfigReady(false);
     }
   };
-  useEffect(() => { loadConfig(); }, []);
+
+  // 加载历史对话（按用户隔离，刷新后仍可见） // Logan.Li
+  const loadHistory = async () => {
+    try {
+      const res = await aiApi.getHistory();
+      const items: ChatHistoryItem[] = (res as any)?.list || [];
+      setMessages(
+        items.map((m) => ({
+          id: String(m.id),
+          role: m.role,
+          content: m.content,
+          timestamp: m.created_at,
+        })),
+      );
+    } catch {
+      // 历史加载失败不阻塞主流程
+    }
+  };
+  useEffect(() => {
+    loadConfig();
+    loadHistory();
+  }, []);
 
   // 切换提供商时自动填充默认 endpoint + 模型 // Logan.Li
   const handleProviderChange = (provider: string) => {
@@ -189,10 +210,16 @@ export function AIOpsAssistant() {
     }
   };
 
-  // 新对话 // Logan.Li
-  const handleNewChat = () => {
+  // 新对话（清空本地 + 后端持久化历史） // Logan.Li
+  const handleNewChat = async () => {
+    try {
+      await aiApi.clearHistory();
+    } catch {
+      // 清除失败不阻塞本地清空
+    }
     setMessages([]);
     setInput('');
+    toast.success('已开始新对话');
   };
 
   const currentProvider = LLM_PROVIDERS.find((p) => p.id === config.provider);
diff --git a/frontend/src/services/api.ts b/frontend/src/services/api.ts
index b88033f..d442f2d 100644
--- a/frontend/src/services/api.ts
+++ b/frontend/src/services/api.ts
@@ -653,6 +653,16 @@ export interface ChatResult {
   tokens_used: number;
 }
 
+// 对话历史条目（后端 ChatHistory 序列化） // Logan.Li
+export interface ChatHistoryItem {
+  id: number;
+  user_id: number;
+  role: 'user' | 'assistant';
+  content: string;
+  model?: string;
+  created_at: string;
+}
+
 export const aiApi = {
   // 获取 LLM 配置（API Key 已脱敏）
   getConfig: () => http.get<LLMConfigData>('/aiops/llm-config'),
@@ -663,4 +673,8 @@ export const aiApi = {
   // AI 对话（messages 含历史 + 当前用户消息）
   chat: (messages: { role: 'user' | 'assistant'; content: string }[]) =>
     http.post<ChatResult>('/aiops/chat', { messages }),
+  // 获取当前用户对话历史（按时间正序，最近 100 条）
+  getHistory: () => http.get<{ list: ChatHistoryItem[]; total: number }>('/aiops/chat-history'),
+  // 清空当前用户对话历史
+  clearHistory: () => http.delete('/aiops/chat-history'),
 };