diff --git a/lib/core/runtime/capture/incoming.ts b/lib/core/runtime/capture/incoming.ts
index f5542d99..fb153ea3 100644
--- a/lib/core/runtime/capture/incoming.ts
+++ b/lib/core/runtime/capture/incoming.ts
@@ -29,10 +29,19 @@ export const captureReadableStream = (
     body: Buffer.alloc(0)
   };
 
+  Object.defineProperty(info, "body", {
+    // 需要用的时候才拼接buffer
+    get: () => Buffer.concat(info.bodyChunks)
+  });
+
   const handler = (chunk: any): void => {
     info.bodyLength += Buffer.byteLength(chunk);
+    // 到达最大限制后，不再记录回包内容
+    if (info.bodyTooLarge) {
+      return;
+    }
+
     info.bodyChunks.push(Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk));
-    info.body = Buffer.concat(info.bodyChunks);
     info.bodyTooLarge = info.bodyLength > maxBodySize;
   };
 
diff --git a/lib/core/runtime/capture/outgoing.ts b/lib/core/runtime/capture/outgoing.ts
index dff1d7d9..96f23b23 100644
--- a/lib/core/runtime/capture/outgoing.ts
+++ b/lib/core/runtime/capture/outgoing.ts
@@ -30,6 +30,11 @@ export const captureOutgoing = (outgoing: http.OutgoingMessage): void => {
       callback = callbackOrUndefined;
     }
 
+    // 达到最大长度限制，不再收集包内容
+    if (bodyLength > maxBodySize) {
+      return fn.apply(outgoing, [data, encoding, callback]);
+    }
+
     const buffer = ((): Buffer => {
       if (Buffer.isBuffer(data)) {
         return data;
diff --git a/lib/core/runtime/create-server.hack.ts b/lib/core/runtime/create-server.hack.ts
index d496552e..7fd99402 100644
--- a/lib/core/runtime/create-server.hack.ts
+++ b/lib/core/runtime/create-server.hack.ts
@@ -9,7 +9,7 @@
 import * as http from "http";
 import * as https from "https";
 import * as domain from "domain";
-import currentContext, { Context, RequestLog } from "../context";
+import { Context, RequestLog } from "../context";
 import { address } from "ip";
 import { AddressInfo, isIP } from "net";
 import { captureOutgoing } from "./capture/outgoing";