Abstract In order to solve the problem that the full physical experiment of BDS/MEMS IMU deep integration navigation is difficult, a simulation analysis method based on software receiver for BDS/MEMS IMU deep integration navigation system is proposed, which are convenient for evaluation and validation of BDS/MEMS IMU deep integrated navigation performance.The structure of BDS software receiver is given, the deep integration navigation structure and filtering algorithm are introduced.Finally based on the simulation date to verify the analysis.Simulation shows that the deep integration system can improve the navigation accuracy greatly compared with tight integration system, with the position error less than 1 m and velocity error less than 0.01 m/s.