In order to ensure the realtime performance of vehicle steering system, the transmission delay which is an important factor of clock synchronization is researched in this paper,especially uncertainty of transmission delay.With the nodes send message with each other,action point of local node could get corresponding timestamp message which is sent by the load segment of synchronous message,and the algorithm could be concluded with the timestamp and the corresponding FlexRay nodes.This algorithm could be applied to the startup of distributed system, with transmission of synchronization message,transmission delay and decoding consumption could be calculated,then configuring node, and the clock synchronization accuracy of the system could be improved and the bandwidth resources also couldn’t be wasted. According to the simulation of FlexRay steeringbywire system which the algorithm has been embedded,after correction of transmission delay,the asynchronous nodes could be adjusted effectively.the algorithm improve the overall realtime and reliability,which is of certain significance to the development of automobile technology.