diff --git a/src/main/config/smartOverride.ts b/src/main/config/smartOverride.ts
index 4a629c01..10daa373 100644
--- a/src/main/config/smartOverride.ts
+++ b/src/main/config/smartOverride.ts
@@ -1,6 +1,6 @@
 import { overrideLogger } from '../utils/logger'
 import { getAppConfig } from './app'
-import { addOverrideItem, removeOverrideItem, getOverrideItem } from './override'
+import { addOverrideItem, removeOverrideItem, getOverrideItem, getOverride } from './override'
 
 const SMART_OVERRIDE_ID = 'smart-core-override'
 
@@ -377,6 +377,13 @@ export async function createSmartOverride(): Promise<void> {
       smartCollectorSize
     )
 
+    // 热重载每次生效前都会重新生成覆写，内容未变时跳过写盘，避免无谓的时间戳刷新
+    const existing = await getOverrideItem(SMART_OVERRIDE_ID)
+    if (existing) {
+      const current = await getOverride(SMART_OVERRIDE_ID, 'js')
+      if (current === template) return
+    }
+
     await addOverrideItem({
       id: SMART_OVERRIDE_ID,
       name: 'Smart Core Override',
diff --git a/src/main/core/manager.ts b/src/main/core/manager.ts
index 6c8a04c9..2be78f6d 100644
--- a/src/main/core/manager.ts
+++ b/src/main/core/manager.ts
@@ -46,6 +46,7 @@ import {
   getAxios
 } from './mihomoApi'
 import { generateProfile } from './factory'
+import { syncSmartModelToTestDir } from './smartModel'
 import {
   checkAdminRestartForTun as checkAdminRestartForTunWithRestart,
   getSessionAdminStatus,
@@ -967,6 +968,7 @@ export async function checkProfileConfig(
   ageSecretKey?: string
 ): Promise<void> {
   const corePath = mihomoCorePath(core)
+  await syncSmartModelToTestDir()
 
   try {
     await execFilePromise(corePath, ['-t', '-f', configPath, '-d', mihomoTestDir()], {
diff --git a/src/main/core/mihomoApi.ts b/src/main/core/mihomoApi.ts
index 86f59a22..e382608f 100644
--- a/src/main/core/mihomoApi.ts
+++ b/src/main/core/mihomoApi.ts
@@ -2,7 +2,7 @@ import { createConnection } from 'net'
 import axios, { AxiosInstance } from 'axios'
 import WebSocket from 'ws'
 import { app } from 'electron'
-import { getAppConfig, getControledMihomoConfig } from '../config'
+import { getAppConfig, getControledMihomoConfig, manageSmartOverride } from '../config'
 import { mainWindow } from '../window'
 import { tray } from '../resolve/tray'
 import { calcTraffic } from '../utils/calc'
@@ -434,6 +434,9 @@ export const mihomoHotReloadConfig = async (): Promise<void> => {
     await restartCore()
     return
   }
+  // Smart 覆写脚本由应用配置生成，必须先同步再生成配置，
+  // 否则界面上改动的 Smart 选项会沿用旧脚本，要等到下次重启内核才生效
+  await manageSmartOverride()
   const current = await generateProfile()
   const { diffWorkDir = false } = await getAppConfig()
   const configPath = diffWorkDir ? mihomoWorkConfigPath(current) : mihomoWorkConfigPath('work')
diff --git a/src/main/core/smartModel.ts b/src/main/core/smartModel.ts
new file mode 100644
index 00000000..8b3ec2c6
--- /dev/null
+++ b/src/main/core/smartModel.ts
@@ -0,0 +1,34 @@
+import { copyFile, stat } from 'fs/promises'
+import { existsSync } from 'fs'
+import path from 'path'
+import { mihomoWorkDir, mihomoTestDir } from '../utils/dirs'
+import { managerLogger } from '../utils/logger'
+
+const MODEL_FILE = 'Model.bin'
+
+async function isSourceNewer(sourcePath: string, targetPath: string): Promise<boolean> {
+  try {
+    const [sourceStats, targetStats] = await Promise.all([stat(sourcePath), stat(targetPath)])
+    return sourceStats.mtime > targetStats.mtime
+  } catch {
+    return true
+  }
+}
+
+// Smart 内核在工作目录找不到 Model.bin 时会联网下载模型。而配置检查（mihomo -t）跑在独立的
+// test 目录里，该目录从不包含模型；这次检查又发生在旧内核已经停止、系统代理已经撤下之后，
+// 于是下载必然超时失败，每次重启白白多等约 20 秒，且失败不留文件，下次重启重演一遍。
+// 正式工作目录已有模型时先同步过去，跳过这次注定失败的下载。
+export async function syncSmartModelToTestDir(): Promise<void> {
+  const source = path.join(mihomoWorkDir(), MODEL_FILE)
+  if (!existsSync(source)) return
+
+  const target = path.join(mihomoTestDir(), MODEL_FILE)
+  if (existsSync(target) && !(await isSourceNewer(source, target))) return
+
+  try {
+    await copyFile(source, target)
+  } catch (error) {
+    managerLogger.warn('Failed to sync Model.bin into test dir', error)
+  }
+}