The features of real time and concurrence are very important to the real time control system( RTCS ). The conflict of these features can be coordinated by using effective task scheduling algorithm software, thus both real time and concurrence can be ensured. A dispatch algorithm based on bit map is stated. It is suitable for complicated system which requests both real time and concurrence. The critical issues to be noted in design of dispatch algorithm program are discussed.%实时控制系统(RTCS)中的实时性和并行性非常重要。可以采用有效的任务调度算法程序来协调两者之间的矛盾，保证系统的实时性和并行性。提出了一种基于Bit Map的调度算法，能较好地满足复杂系统的实时性与并行性要求。对调度算法程序设计中应注意的关键问题也作了讨论。
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