diff --git a/media/USER_MANUAL.md b/media/USER_MANUAL.md
index 47cc091..4b1eeed 100644
--- a/media/USER_MANUAL.md
+++ b/media/USER_MANUAL.md
@@ -104,7 +104,7 @@
 
 **症状**：安装 VSIX 文件时报错
 
-#### **解决方案**：
+#### 解决方案：
 
 - 确认 VS Code 版本 >= 1.60.0
 
diff --git a/src/extension.ts b/src/extension.ts
index 08018fc..6e013b6 100644
--- a/src/extension.ts
+++ b/src/extension.ts
@@ -2,6 +2,7 @@ import * as vscode from "vscode";
 import { ICViewProvider } from "./views/ICViewProvider";
 import { showICHelperPanel } from "./panels/ICHelperPanel";
 import { VCDViewerPanel, VCDViewerEditorProvider } from "./panels/VCDViewerPanel";
+import { UserManualPanel } from "./panels/UserManualPanel";
 import { ChatHistoryManager } from "./utils/chatHistoryManager";
 import { ICCoderAuthenticationProvider } from "./services/icCoderAuthProvider";
 import { VCDFileServer } from "./services/vcdFileServer";
@@ -184,9 +185,8 @@ export async function activate(context: vscode.ExtensionContext) {
   // 注册命令：打开用户手册
   const openUserManualCommand = vscode.commands.registerCommand(
     "ic-coder.openUserManual",
-    async () => {
-      const manualPath = vscode.Uri.joinPath(context.extensionUri, "media", "USER_MANUAL.md");
-      await vscode.commands.executeCommand("markdown.showPreview", manualPath);
+    () => {
+      UserManualPanel.render(context.extensionUri);
     }
   );
 
diff --git a/src/panels/UserManualPanel.ts b/src/panels/UserManualPanel.ts
new file mode 100644
index 0000000..e3f35e1
--- /dev/null
+++ b/src/panels/UserManualPanel.ts
@@ -0,0 +1,181 @@
+/**
+ * 用户手册只读预览面板
+ */
+
+import * as vscode from "vscode";
+
+export class UserManualPanel {
+  public static currentPanel: UserManualPanel | undefined;
+  private readonly _panel: vscode.WebviewPanel;
+  private _disposables: vscode.Disposable[] = [];
+
+  private constructor(panel: vscode.WebviewPanel, extensionUri: vscode.Uri) {
+    this._panel = panel;
+    this._panel.onDidDispose(() => this.dispose(), null, this._disposables);
+    this._update(extensionUri);
+  }
+
+  public static render(extensionUri: vscode.Uri) {
+    if (UserManualPanel.currentPanel) {
+      UserManualPanel.currentPanel._panel.reveal(vscode.ViewColumn.One);
+    } else {
+      const panel = vscode.window.createWebviewPanel(
+        "userManual",
+        "IC Coder 用户手册",
+        vscode.ViewColumn.One,
+        {
+          enableScripts: true,
+          localResourceRoots: [vscode.Uri.joinPath(extensionUri, "media")],
+        },
+      );
+      UserManualPanel.currentPanel = new UserManualPanel(panel, extensionUri);
+    }
+  }
+
+  private async _update(extensionUri: vscode.Uri) {
+    const manualPath = vscode.Uri.joinPath(
+      extensionUri,
+      "media",
+      "USER_MANUAL.md",
+    );
+    const markdown = await vscode.workspace.fs.readFile(manualPath);
+    const content = Buffer.from(markdown).toString("utf-8");
+    this._panel.webview.html = await this._getHtmlContent(
+      content,
+      extensionUri,
+    );
+  }
+
+  private async _getHtmlContent(
+    markdown: string,
+    extensionUri: vscode.Uri,
+  ): Promise<string> {
+    let inCodeBlock = false;
+    let inTable = false;
+    let tableRows: string[] = [];
+    const lines: string[] = [];
+
+    // 先处理图片
+    markdown = markdown.replace(/!\[([^\]]*)\]\(([^)]+)\)/g, (_, alt, src) => {
+      const imgUri = this._panel.webview.asWebviewUri(
+        vscode.Uri.joinPath(extensionUri, "media", src),
+      );
+      return `<img src="${imgUri}" alt="${alt}">`;
+    });
+
+    markdown.split("\n").forEach((line) => {
+      // 代码块
+      if (line.startsWith("```")) {
+        if (inCodeBlock) {
+          lines.push("</code></pre>");
+          inCodeBlock = false;
+        } else {
+          lines.push("<pre><code>");
+          inCodeBlock = true;
+        }
+        return;
+      }
+      if (inCodeBlock) {
+        lines.push(line);
+        return;
+      }
+
+      // 表格
+      if (line.startsWith("|")) {
+        if (!inTable) inTable = true;
+        tableRows.push(line);
+        return;
+      } else if (inTable) {
+        // 表格结束
+        const headers = tableRows[0]
+          .split("|")
+          .filter((c) => c.trim())
+          .map((h) => `<th>${h.trim()}</th>`)
+          .join("");
+        const body = tableRows
+          .slice(2)
+          .map(
+            (r) =>
+              "<tr>" +
+              r
+                .split("|")
+                .filter((c) => c.trim())
+                .map((c) => `<td>${c.trim()}</td>`)
+                .join("") +
+              "</tr>",
+          )
+          .join("");
+        lines.push(
+          `<table><thead><tr>${headers}</tr></thead><tbody>${body}</tbody></table>`,
+        );
+        tableRows = [];
+        inTable = false;
+      }
+
+      // 其他行
+      if (line === "---") lines.push("<hr>");
+      else if (line.startsWith("#### "))
+        lines.push(`<h4>${line.slice(5)}</h4>`);
+      else if (line.startsWith("### ")) lines.push(`<h3>${line.slice(4)}</h3>`);
+      else if (line.startsWith("## ")) lines.push(`<h2>${line.slice(3)}</h2>`);
+      else if (line.startsWith("# ")) lines.push(`<h1>${line.slice(2)}</h1>`);
+      else if (line.startsWith("- "))
+        lines.push(
+          `<li>${line.slice(2).replace(/\*\*(.+?)\*\*/g, "<strong>$1</strong>")}</li>`,
+        );
+      else if (line.trim() === "") lines.push("<p></p>");
+      else
+        lines.push(
+          `<p>${line.replace(/\*\*(.+?)\*\*/g, "<strong>$1</strong>").replace(/\[(.+?)\]\((.+?)\)/g, '<a href="$2">$1</a>')}</p>`,
+        );
+    });
+
+    const html = lines
+      .join("\n")
+      .replace(/((?:<li>.*<\/li>\n?)+)/g, "<ul>$1</ul>");
+
+    return `<!DOCTYPE html>
+<html>
+<head>
+  <meta charset="UTF-8">
+  <style>
+    body {
+      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
+      padding: 40px;
+      line-height: 1.8;
+      font-size: 16px;
+      max-width: 1000px;
+      margin: 0 auto;
+    }
+    h1 { font-size: 2em; border-bottom: 3px solid #ddd; padding-bottom: 15px; margin: 30px 0 20px; }
+    h2 { font-size: 1.6em; margin-top: 40px; border-bottom: 2px solid #eee; padding-bottom: 10px; }
+    h3 { font-size: 1.3em; margin-top: 30px; }
+    h4 { font-size: 1.1em; margin-top: 20px; font-weight: 600; }
+    p { margin: 15px 0; }
+    img { display: block; margin: 30px auto; max-width: 100%; border: 1px solid #ddd; border-radius: 6px; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
+    table { border-collapse: collapse; width: 100%; margin: 25px 0; font-size: 15px; }
+    th, td { border: 1px solid #ddd; padding: 12px 16px; text-align: left; }
+    th { background: #636363; font-weight: 600; }
+    tr:hover { background: #636363; }
+    ul { margin: 15px 0; padding-left: 30px; }
+    li { margin: 8px 0; margin-left: 40px;}
+    pre { background: #2f2f2f; padding: 20px; border-radius: 6px; overflow-x: auto; margin: 20px 0; border: 1px solid #e0e0e0; }
+    code { font-family: 'Consolas', 'Monaco', monospace; font-size: 14px; line-height: 1.6; }
+    hr { border: none; border-top: 2px solid #e0e0e0; margin: 30px 0; }
+    a { color: #0066cc; text-decoration: none; }
+    a:hover { text-decoration: underline; }
+    strong { font-weight: 600; color: #e5e5e5; }
+  </style>
+</head>
+<body>${html}</body>
+</html>`;
+  }
+
+  public dispose() {
+    UserManualPanel.currentPanel = undefined;
+    this._panel.dispose();
+    while (this._disposables.length) {
+      this._disposables.pop()?.dispose();
+    }
+  }
+}