diff --git a/src/mc/src/can_driver.cpp b/src/mc/src/can_driver.cpp
index 49fe32f..ca572f4 100644
--- a/src/mc/src/can_driver.cpp
+++ b/src/mc/src/can_driver.cpp
@@ -129,7 +129,7 @@ void CANDriver::receiveThreadFunc()
     ULONG len = 0;
     {
       std::lock_guard<std::mutex> lock(canMutex); // 加锁
-      len = VCI_Receive(deviceType, deviceIndex, channelIndex, rec, 100, 10);
+      len = VCI_Receive(deviceType, deviceIndex, channelIndex, rec, maxFrames, 10);
     }
 
     if (len == 0)