针对串口通信实时性和程序灵活性不足的问题,提出了基于MSComm和CSerial Port类的串口通信设计思想。利用稳定可靠、操作方便的MSComm控件和透明灵活的多线程串口类,分析了Win32环境下数据采集软件的开发方法。以Visual C++为开发工具,开发了自动变速实验台数据采集软件,给出软件设计思路和关键步骤代码。该软件在工程车辆自动变速电控实验台数据采集系统中得到很好的应用,为自动变速实验台实验结果的分析提供了有效的检验工具。 Aiming at the problem of real-time serial communication and lack of program flexibility, a serial communication design idea based on MSComm and CSerial Port classes is proposed. Utilizing the stable and reliable MSComm control and transparent and flexible multi-thread serial port, this paper analyzes the development method of data acquisition software in Win32 environment. With Visual C ++ as development tool, the software of data acquisition of automatic speed change experiment platform was developed, and the software design ideas and key step codes were given. The software is applied in the data acquisition system of automatic transmission speed control experiment platform of engineering vehicles and provides an effective test tool for the analysis of experimental results of automatic transmission test bench.