diff --git a/src/services/toolExecutor.ts b/src/services/toolExecutor.ts
index 1964f22..b1ebfff 100644
--- a/src/services/toolExecutor.ts
+++ b/src/services/toolExecutor.ts
@@ -24,7 +24,9 @@ import type {
   FileListArgs,
   SyntaxCheckArgs,
   SimulationArgs,
-  WaveformSummaryArgs
+  WaveformSummaryArgs,
+  KnowledgeSaveArgs,
+  KnowledgeLoadArgs
 } from '../types/api';
 
 /**
@@ -77,6 +79,12 @@ export async function executeToolCall(
       case 'waveform_summary':
         resultText = await executeWaveformSummary(args as unknown as WaveformSummaryArgs);
         break;
+      case 'knowledge_save':
+        resultText = await executeKnowledgeSave(args as unknown as KnowledgeSaveArgs);
+        break;
+      case 'knowledge_load':
+        resultText = await executeKnowledgeLoad();
+        break;
       default:
         throw new Error(`未知工具: ${toolName}`);
     }
@@ -287,6 +295,53 @@ async function executeWaveformSummary(args: WaveformSummaryArgs): Promise<string
   return `波形分析功能暂未实现。\n请求参数:\n- VCD文件: ${args.vcdPath}\n- 信号: ${args.signals}\n- 检查点: ${args.checkpoints || '无'}`;
 }
 
+/**
+ * 执行 knowledge_save 工具
+ * 保存知识图谱到 .iccoder/knowledge.json
+ */
+async function executeKnowledgeSave(args: KnowledgeSaveArgs): Promise<string> {
+  const workspaceFolders = vscode.workspace.workspaceFolders;
+  if (!workspaceFolders || workspaceFolders.length === 0) {
+    throw new Error('请先打开一个工作区');
+  }
+
+  const workspacePath = workspaceFolders[0].uri.fsPath;
+  const iccoderDir = path.join(workspacePath, '.iccoder');
+  const knowledgePath = path.join(iccoderDir, 'knowledge.json');
+
+  // 确保 .iccoder 目录存在
+  if (!fs.existsSync(iccoderDir)) {
+    fs.mkdirSync(iccoderDir, { recursive: true });
+  }
+
+  // 写入知识图谱
+  fs.writeFileSync(knowledgePath, args.data, 'utf-8');
+
+  return `知识图谱已保存: .iccoder/knowledge.json`;
+}
+
+/**
+ * 执行 knowledge_load 工具
+ * 从 .iccoder/knowledge.json 加载知识图谱
+ */
+async function executeKnowledgeLoad(): Promise<string> {
+  const workspaceFolders = vscode.workspace.workspaceFolders;
+  if (!workspaceFolders || workspaceFolders.length === 0) {
+    throw new Error('请先打开一个工作区');
+  }
+
+  const workspacePath = workspaceFolders[0].uri.fsPath;
+  const knowledgePath = path.join(workspacePath, '.iccoder', 'knowledge.json');
+
+  // 如果文件不存在，返回空图谱
+  if (!fs.existsSync(knowledgePath)) {
+    return JSON.stringify({ directed: true, nodes: [], links: [] });
+  }
+
+  const content = fs.readFileSync(knowledgePath, 'utf-8');
+  return content;
+}
+
 /**
  * 获取 iverilog 路径
  */
diff --git a/src/types/api.ts b/src/types/api.ts
index caad53f..7927f4f 100644
--- a/src/types/api.ts
+++ b/src/types/api.ts
@@ -196,7 +196,9 @@ export type ToolName =
   | 'file_list'
   | 'syntax_check'
   | 'simulation'
-  | 'waveform_summary';
+  | 'waveform_summary'
+  | 'knowledge_save'
+  | 'knowledge_load';
 
 /** file_read 工具参数 */
 export interface FileReadArgs {
@@ -240,6 +242,17 @@ export interface WaveformSummaryArgs {
   checkpoints?: string;
 }
 
+/** knowledge_save 工具参数 */
+export interface KnowledgeSaveArgs {
+  /** 知识图谱 JSON 数据 */
+  data: string;
+}
+
+/** knowledge_load 工具参数 */
+export interface KnowledgeLoadArgs {
+  // 无参数，直接读取 .iccoder/knowledge.json
+}
+
 /** 工具参数联合类型 */
 export type ToolArgs =
   | FileReadArgs
@@ -248,4 +261,6 @@ export type ToolArgs =
   | FileListArgs
   | SyntaxCheckArgs
   | SimulationArgs
-  | WaveformSummaryArgs;
+  | WaveformSummaryArgs
+  | KnowledgeSaveArgs
+  | KnowledgeLoadArgs;