Abstract: Based on 20 kW fuel cell stack and fuel cell test system, the fuel cell performance curve was obtained. The output voltage performance curve of Li-ion battery was obtained based on the charging and discharging system of Li-ion power battery. The experimental data were imported into the LMS AMESim software, and the simulation platform of the hybrid power system of fuel cell and Li-ion power battery was established. At the same time, the energy control strategy was introduced to carry out the joint simulation of the hybrid power system. The simulation results under selected working conditions show that the hybrid power system can satisfy the dynamic performance of the vehicle under the selected working conditions and distribute the power among different power sources by allocating the current. The output power of the fuel cell is within a reasonable range and the SOC of the Li-ion power battery remains within a reasonable range without overcharge or overdischarge. The results can provide a theoretical basis and reference for building a hybrid power experimental platform and matching the whole vehicle.