提出了一种动态实时带宽分配算法 ,能够动态估算当前各个结点的实时通信负载 ,分布式地控制各个结点的令牌持有时间 .实时消息 M的负载指数和结点的实时消息负载指数 ,可以有效地衡量结点的实时通信的负载情况 ,为动态分配实时带宽提供依据 .通过模拟实验的测试 ,证明该算法优于固定带宽分配 ,同时也说明上述的两个指数是可行的 A dynamic real-time bandwidth allocation algorithm is proposed, which can dynamically estimate the current real-time communication load of each node and control the token holding time of each node in a distributed manner. The load index of real-time message M and the real-time message load index , Which can effectively measure the real-time communication load of nodes and provide the basis for dynamically allocating real-time bandwidth.Through the simulation experiments, it is proved that the algorithm is better than the fixed bandwidth allocation, and also shows that the above two indexes are feasible