In this paper, we present a new heuristic scheduling algorithm basing on DM algorithm, which makes up for the deficiency of the currently very little collaborative design of FlexRay dynamic segment scheduling method with the worst response time and bus utilization. The algorithm improves the comprehensive efficiency of message worst-case response time and uses bus utilization as the optimization target, and the best FID allocation scheme is obtained. The MATLAB simulation experiment of the scheduling scheme obtained good simulation results.