The battery management system plays a very important role in pure electric vehicles for new energy vehicle. The distributed power battery management system is an integrated system with multi-module control. The complexity and hysteresis of CAN bus communication between each control module is aimed at this problem. It was tested by CANoe/MATLAB joint simulation method. Among them, the multi-module communication model of signal acquisition, SOC estimation and fault diagnosis is established in the MATLAB/Simulink simulation modeling environment. At the same time, the CAN network architecture of the distributed battery management system is established on the CANoe bus simulation platform, and the multi-module is verified. The real-time and accuracy of communication. The results show that the CANoe/MATLAB joint simulation method provides a convenient way to develop the communication strategy of the distributed battery management system.