diff --git a/README.md b/README.md
index e8145a3..efccb92 100644
--- a/README.md
+++ b/README.md
@@ -24,10 +24,6 @@ mark == 1 表示，服务客户端数据。
 
 - 非`transm`客户端链接到服务器，发送不能识别的数据包格式，将导致`buffer`无限增加。
 
-- 服务端如果最大上载速度下载速度（较慢）不一致，将导致大量数据堆积在`Server`端内存等待`Client`端缓慢处理。
-
-- 如果`client`端在传输数据的过程中异常关闭，`Server`端需要丢弃与该客户端相关的数据包。
-
 # 注意
 
-- 如果两个`transmc`客户端在同一台机器上同时收发同一个文件将导致文件丢失损坏。
\ No newline at end of file
+- 如果两个`transmc`客户端在同一台机器上同时收发同一个文件将导致文件丢失损坏。
diff --git a/client/client.cpp b/client/client.cpp
index a094bbc..78211d7 100644
--- a/client/client.cpp
+++ b/client/client.cpp
@@ -107,6 +107,10 @@ bool CClient::get_task_list()
 
 bool CClient::down_task(const std::string& param)
 {
+    if (downloading_) {
+        logger_->warn("Have Task Downloading, Please wait.....");
+        return false;
+    }
     int id = std::stoi(param);
     if (!task_list_.count(id)) {
         logger_->error("No matched id[{}] in task list.", id);
@@ -212,6 +216,10 @@ void CClient::report_trans_ret(TransState state, const std::string& key)
     std::shared_ptr<TransInfomation> t = nullptr;
     if (key.empty()) {
         t = down_;
+        downloading_ = false;
+        if (th_down_active_.joinable()) {
+            th_down_active_.join();
+        }
     } else {
         std::lock_guard<std::mutex> lock(mutex_);
         if (up_.count(key)) {
@@ -243,7 +251,6 @@ bool CClient::send_frame(CFrameBuffer* buf)
     }
     std::lock_guard<std::mutex> lock(send_mut_);
     if (!client_->send(out_buf, out_len)) {
-        logger_->error("{} send failed.", __FUNCTION__);
         delete[] out_buf;
         return false;
     }
@@ -300,6 +307,10 @@ void CClient::handle_frame(CFrameBuffer* buf)
     }
     // 能接收到 TRANS 一定是客户端（这里不是指Server）
     case TYPE_TRANS_FILE: {
+        if (!downloading_) {
+            downloading_ = true;
+            th_down_active_ = std::thread([&]() { judget_down_active(); });
+        }
         auto ws = fwrite(buf->data_, 1, buf->len_, down_->file_);
         if (static_cast<int>(ws) != buf->len_) {
             logger_->warn("no matched write and data.");
@@ -340,9 +351,18 @@ void CClient::handle_frame(CFrameBuffer* buf)
     }
     case TYPE_OFFLINE: {
         if (buf->mark_) {
-            report_trans_ret(TRANS_FAILED, buf->fid_);
+            std::lock_guard<std::mutex> lock(mutex_);
+            if (!up_.count(buf->fid_)) {
+                logger_->warn("Offline no match.");
+                break;
+            }
+            auto t = up_[buf->fid_];
+            t->trans_state_ = TRANS_BREAK;
             break;
         }
+        if (!down_->cur_remote_file_.empty()) {
+            logger_->warn("Stop Down {} From {}.", down_->cur_remote_file_, buf->fid_);
+        }
         report_trans_ret(TRANS_FAILED);
         break;
     }
@@ -372,12 +392,18 @@ void CClient::send_file_data_th(const char* keys)
     buf->data_ = new char[g_BuffSize]{};
     buf->mark_ = 1;
     while (!feof(t->file_)) {
+        if (t->trans_state_ == TRANS_BREAK) {
+            logger_->warn("Stop Trans {} To {} failed.", t->cur_file_, str_key);
+            report_trans_ret(TRANS_FAILED, str_key);
+            return;
+        }
         buf->len_ = fread(buf->data_, 1, g_BuffSize, t->file_);
         if (!send_frame(buf.get())) {
             report_trans_ret(TRANS_FAILED, str_key);
-            logger_->error("send_file_data_th send failed.");
+            logger_->error("Stop Trans {} To {} failed.", t->cur_file_, str_key);
             return;
         }
+        //std::this_thread::sleep_for(std::chrono::milliseconds(10));
     }
 
     buf->type_ = TYPE_TRANS_DONE;
@@ -400,3 +426,14 @@ void CClient::hearts()
         }
     }
 }
+
+void CClient::judget_down_active()
+{
+    std::shared_ptr<CFrameBuffer> buf = std::make_shared<CFrameBuffer>();
+    buf->type_ = TYPE_JUDGE_ACTIVE;
+    buf->tid_ = down_->cur_remote_id_;
+    while (downloading_ && th_run_) {
+        std::this_thread::sleep_for(std::chrono::milliseconds(2000));
+        send_frame(buf.get());
+    }
+}
diff --git a/client/client.h b/client/client.h
index 7e52520..370458c 100644
--- a/client/client.h
+++ b/client/client.h
@@ -18,7 +18,8 @@ enum TransState {
     TRANS_FAILED,
     TRANS_ING,
     TRANS_REDAY,
-    TRANS_DONE
+    TRANS_DONE,
+    TRANS_BREAK
 };
 
 struct TransInfomation {
@@ -53,6 +54,7 @@ private:
     void handle_frame(CFrameBuffer* buf);
     void send_file_data_th(const char* keys);
     void hearts();
+    void judget_down_active();
 
 private:
     std::mutex mutex_;
@@ -61,6 +63,7 @@ private:
     std::thread hearts_;
     CThreadSleep sleep_;
     bool th_run_{false};
+    bool downloading_{false};
     std::shared_ptr<spdlog::logger> logger_;
     asio::io_context io_context_;
     std::shared_ptr<CTcpClient> client_;
@@ -69,4 +72,5 @@ private:
     std::shared_ptr<TransInfomation> down_;
     std::vector<std::thread> ths_;
     std::map<std::string, std::shared_ptr<TransInfomation>> up_;
+    std::thread th_down_active_;
 };
\ No newline at end of file
diff --git a/server/server.cpp b/server/server.cpp
index 6cd8f1c..dcd68a6 100644
--- a/server/server.cpp
+++ b/server/server.cpp
@@ -126,6 +126,18 @@ void CTcpServer::trans_data(CFrameBuffer* buf)
         }
         break;
     }
+    case TYPE_JUDGE_ACTIVE: {
+        if (fcli && tcli) {
+            break;
+        }
+        if (fcli && tcli == nullptr) {
+            buf->type_ = TYPE_OFFLINE;
+            std::swap(buf->fid_, buf->tid_);
+            send_frame(fcli->socket_, buf);
+            break;
+        }
+        break;
+    }
     // 两边发送OPEN
     case TYPE_OPEN_FILE:
     case TYPE_TRANS_DONE:
diff --git a/util/util.h b/util/util.h
index c9c431a..e24c38c 100644
--- a/util/util.h
+++ b/util/util.h
@@ -20,7 +20,8 @@ enum FrameType : int16_t {
     TYPE_NO_HIT_TASK,
     TYPE_WAITTING,
     TYPE_HEARTS,
-    TYPE_OFFLINE
+    TYPE_OFFLINE,
+    TYPE_JUDGE_ACTIVE
 };
 
 using namespace ofen;