This article briefly introduces the working principle of the Beidou receiver module.Combined with the use of Beidou receiver module,using the fault tree analysis method,this article analysis and researches on the problem of Beidou receiver module timing accuracy deterioration.After analysis,the reason for the problem is that the receiving channel of the module can not automatically release,which results in the receiving channel reach saturation so that can not continue to capture the satellite.By upgrading the baseband algorithm software,the method of increasing releasing function of the receiving channel can effectively solve the problem of capturing the satellite in the special environment,The correctness and feasibility of the method is verified by testing,which finally improve the stability of Beidou receiver module,achieve time synchronization between shore and ship,and provide reliable protection to the requirements of tracking and control tasks aboard.The solution of this problem is of great significance to the popularization and application of Beidou receiving module.