diff --git a/src/App.jsx b/src/App.jsx
index 950e072..980cf91 100644
--- a/src/App.jsx
+++ b/src/App.jsx
@@ -1,4 +1,4 @@
-import React, { useState, useCallback, useEffect } from 'react';
+import React, { useState, useCallback, useEffect, useRef } from 'react';
 import { FileUpload } from './components/FileUpload';
 import { RegexControls } from './components/RegexControls';
 import { FileList } from './components/FileList';
@@ -9,27 +9,36 @@ import { FileConfigModal } from './components/FileConfigModal';
 import { PanelLeftClose, PanelLeftOpen } from 'lucide-react';
 import { mergeFilesWithReplacement } from './utils/mergeFiles.js';
 
+// 默认全局解析配置
+export const DEFAULT_GLOBAL_PARSING_CONFIG = {
+  metrics: [
+    {
+      name: 'Loss',
+      mode: 'keyword',
+      keyword: 'loss:',
+      regex: 'loss:\\s*([\\d.eE+-]+)'
+    },
+    {
+      name: 'Grad Norm',
+      mode: 'keyword',
+      keyword: 'norm:',
+      regex: 'grad[\\s_]norm:\\s*([\\d.eE+-]+)'
+    }
+  ],
+  useStepKeyword: false,
+  stepKeyword: 'step:'
+};
+
 function App() {
-  const [uploadedFiles, setUploadedFiles] = useState([]);
-  
+  const [uploadedFiles, setUploadedFiles] = useState(() => {
+    const stored = localStorage.getItem('uploadedFiles');
+    return stored ? JSON.parse(stored) : [];
+  });
+
   // 全局解析配置状态
-  const [globalParsingConfig, setGlobalParsingConfig] = useState({
-    metrics: [
-      {
-        name: 'Loss',
-        mode: 'keyword', // 'keyword' | 'regex'
-        keyword: 'loss:',
-        regex: 'loss:\\s*([\\d.eE+-]+)'
-      },
-      {
-        name: 'Grad Norm',
-        mode: 'keyword',
-        keyword: 'norm:',
-        regex: 'grad[\\s_]norm:\\s*([\\d.eE+-]+)'
-      }
-    ],
-    useStepKeyword: false,
-    stepKeyword: 'step:'
+  const [globalParsingConfig, setGlobalParsingConfig] = useState(() => {
+    const stored = localStorage.getItem('globalParsingConfig');
+    return stored ? JSON.parse(stored) : JSON.parse(JSON.stringify(DEFAULT_GLOBAL_PARSING_CONFIG));
   });
   
   const [compareMode, setCompareMode] = useState('normal');
@@ -42,6 +51,29 @@ function App() {
   const [xRange, setXRange] = useState({ min: undefined, max: undefined });
   const [maxStep, setMaxStep] = useState(0);
   const [sidebarVisible, setSidebarVisible] = useState(true);
+  const savingDisabledRef = useRef(false);
+
+  // 持久化配置到 localStorage
+  useEffect(() => {
+    if (savingDisabledRef.current) return;
+    localStorage.setItem('globalParsingConfig', JSON.stringify(globalParsingConfig));
+  }, [globalParsingConfig]);
+
+  useEffect(() => {
+    if (savingDisabledRef.current) return;
+    const serialized = uploadedFiles.map(({ id, name, enabled, content, config }) => ({
+      id,
+      name,
+      enabled,
+      content,
+      config
+    }));
+    if (serialized.length > 0) {
+      localStorage.setItem('uploadedFiles', JSON.stringify(serialized));
+    } else {
+      localStorage.removeItem('uploadedFiles');
+    }
+  }, [uploadedFiles]);
 
   const handleFilesUploaded = useCallback((files) => {
     const filesWithDefaults = files.map(file => ({
@@ -132,7 +164,19 @@ function App() {
         useStepKeyword: newConfig.useStepKeyword,
         stepKeyword: newConfig.stepKeyword
       }
-    })));
+    }))); 
+  }, []);
+
+  // 重置配置
+  const handleResetConfig = useCallback(() => {
+    savingDisabledRef.current = true;
+    localStorage.removeItem('globalParsingConfig');
+    localStorage.removeItem('uploadedFiles');
+    setGlobalParsingConfig(JSON.parse(JSON.stringify(DEFAULT_GLOBAL_PARSING_CONFIG)));
+    setUploadedFiles([]);
+    setTimeout(() => {
+      savingDisabledRef.current = false;
+    }, 0);
   }, []);
 
   // 全局拖拽事件处理
@@ -306,9 +350,16 @@ function App() {
                   </svg>
                   <span>GitHub</span>
                 </a>
+                <button
+                  onClick={handleResetConfig}
+                  className="inline-flex items-center gap-1 px-2 py-1 rounded-full text-xs font-medium bg-red-100 text-red-700 hover:bg-red-200 focus:outline-none focus:ring-2 focus:ring-red-500 focus:ring-offset-2"
+                  aria-label="重置配置"
+                >
+                  重置配置
+                </button>
               </div>
             </div>
-            
+
             <FileUpload onFilesUploaded={handleFilesUploaded} />
             
             <RegexControls
diff --git a/src/components/__tests__/AppConfigPersistence.test.jsx b/src/components/__tests__/AppConfigPersistence.test.jsx
new file mode 100644
index 0000000..e758ec0
--- /dev/null
+++ b/src/components/__tests__/AppConfigPersistence.test.jsx
@@ -0,0 +1,118 @@
+import React from 'react';
+import { render, screen, waitFor, fireEvent } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import { describe, it, expect, beforeEach, vi } from 'vitest';
+import '@testing-library/jest-dom/vitest';
+import App from '../../App.jsx';
+
+// Mock chart.js and react-chartjs-2 to avoid canvas requirements
+vi.mock('chart.js', () => {
+  const Chart = {
+    register: vi.fn(),
+    defaults: { plugins: { legend: { labels: { generateLabels: vi.fn(() => []) } } } }
+  };
+  return {
+    Chart,
+    ChartJS: Chart,
+    CategoryScale: {},
+    LinearScale: {},
+    PointElement: {},
+    LineElement: {},
+    Title: {},
+    Tooltip: {},
+    Legend: {},
+  };
+});
+
+vi.mock('react-chartjs-2', async () => {
+  const React = await import('react');
+  return {
+    Line: React.forwardRef(() => <div data-testid="line-chart" />)
+  };
+});
+
+vi.mock('chartjs-plugin-zoom', () => ({ default: {} }));
+
+function stubFileReader(result) {
+  class FileReaderMock {
+    constructor() {
+      this.onload = null;
+    }
+    readAsText() {
+      this.onload({ target: { result } });
+    }
+  }
+  global.FileReader = FileReaderMock;
+}
+
+describe('App configuration persistence', () => {
+  beforeEach(() => {
+    localStorage.clear();
+  });
+
+  it('saves and restores config from localStorage', async () => {
+    stubFileReader('loss: 1');
+    const user = userEvent.setup();
+
+    const { unmount } = render(<App />);
+
+    const input = screen.getByLabelText('选择日志文件，支持所有文本格式');
+    const file = new File(['hello'], 'test.log', { type: 'text/plain' });
+    await user.upload(input, file);
+
+    const stepToggle = screen.getAllByLabelText('使用 Step 关键字')[0];
+    await user.click(stepToggle);
+    const stepInput = screen.getByPlaceholderText('step:');
+    fireEvent.change(stepInput, { target: { value: 'iter:' } });
+
+    await waitFor(() => expect(JSON.parse(localStorage.getItem('uploadedFiles'))).toHaveLength(1));
+    await waitFor(() => {
+      const cfg = JSON.parse(localStorage.getItem('globalParsingConfig'));
+      expect(cfg.stepKeyword).toBe('iter:');
+      expect(cfg.useStepKeyword).toBe(true);
+    });
+
+    unmount();
+
+    render(<App />);
+
+    expect(await screen.findByText('test.log')).toBeInTheDocument();
+    const restoredToggle = screen.getAllByLabelText('使用 Step 关键字')[0];
+    expect(restoredToggle).toBeChecked();
+    const restoredInput = screen.getByPlaceholderText('step:');
+    expect(restoredInput.value).toBe('iter:');
+  });
+
+  it('resets config and clears localStorage', async () => {
+    localStorage.setItem('globalParsingConfig', JSON.stringify({ metrics: [], useStepKeyword: true, stepKeyword: 'foo:' }));
+    localStorage.setItem('uploadedFiles', JSON.stringify([
+      {
+        id: '1',
+        name: 'saved.log',
+        enabled: true,
+        content: 'loss:1',
+        config: { metrics: [], dataRange: { start: 0, end: undefined, useRange: false }, useStepKeyword: true, stepKeyword: 'foo:' }
+      }
+    ]));
+
+    const user = userEvent.setup();
+    render(<App />);
+
+    expect(screen.getByText('saved.log')).toBeInTheDocument();
+    expect(screen.getAllByLabelText('使用 Step 关键字')[0]).toBeChecked();
+
+    const resetButtons = screen.getAllByRole('button', { name: '重置配置' });
+    for (const btn of resetButtons) {
+      await user.click(btn);
+    }
+
+    await waitFor(() => {
+      expect(localStorage.getItem('uploadedFiles')).toBeNull();
+      expect(localStorage.getItem('globalParsingConfig')).toBeNull();
+      expect(screen.queryByText('saved.log')).not.toBeInTheDocument();
+    });
+
+    expect(screen.getAllByLabelText('使用 Step 关键字')[0]).not.toBeChecked();
+  });
+});
+