由于VXI总线协议规定了详尽的电气和机械规范,同时又提供了灵活的通讯协议,在自动测试领域和其它多仪器系统中已经得到了广泛的应用。VXI器件研制中,上层控制软件和底层硬件、总线接口模块和功能实现模块之间是相对独立的,具有良好的模块化特征,因而相应部分的研制任务是可分的,可以同步进行。基于同样的理由,器件资源具有可继承、可移植的特征。文中首先介绍了作者研制的VXI总线消息基器件的结构和工作方式,并以此为例,说明了VXI消息基器件研制任务可分性,研制成果的模块化特征和可继承性等特点。最后,说明了在消息基器件研制中需要注意的几点问题 VXI bus protocol provides detailed electrical and mechanical specifications, while providing a flexible communication protocol in the field of automatic testing and other multi-instrumentation system has been widely used. VXI device development, the upper control software and the underlying hardware, bus interface module and the functional implementation of the module is relatively independent, has a good modular features, and thus the corresponding part of the development task is separable, can be carried out simultaneously. For the same reason, device resources have inheritable and portable features. This paper first introduces the structure and working method of the VXI bus message base device developed by the author. Taking this as an example, this paper illustrates the characteristics of VXI message base device, such as the task partitionability, the modular features and the inheritance of the development results. Finally, it shows some problems to be noticed in the development of message base device