针对传统分布式互斥算法中存在的消息复杂度高、延迟时间长等缺点,在传统Mackawa算法的基础上,提出了基于读写特征的现场总线分布式互斥算法.该算法通过区分读写特征,降低了消息复杂度;通过采用并行时序,缩短了响应时间.与传统算法的性能对比结果表明:该算法有较低的消息复杂度和较好的实时性. In view of the shortcomings of the traditional distributed mutex algorithm, such as high complexity and long delay time, based on the traditional Mackawa algorithm, a field bus distributed mutex algorithm based on read-write characteristics is proposed. Characteristics and reduces the complexity of messages.Compared with the traditional algorithm, the performance of the proposed algorithm is reduced by using parallel time series.The results show that the proposed algorithm has lower message complexity and better real-time performance.