Liquid hydrogen fuel cell automobile power system capable of avoiding hydrogen leakage losses

The invention relates to the field of new energy automobiles and provides a liquid hydrogen fuel cell automobile power system capable of avoiding hydrogen leakage losses. The liquid hydrogen fuel cell automobile power system capable of avoiding hydrogen leakage losses comprises a liquid hydrogen storage tank, a main fuel cell stack, an electrical assembly, a motor, a pressure transmission element, an auxiliary fuel cell stack, a fuel cell stack assisting device, a storage battery set and a control system module, wherein a fuel outlet of the liquid hydrogen storage tank is connected with the main fuel cell stack and the auxiliary fuel cell stack, the main fuel cell stack is connected with the motor and the storage battery set after passing through the electric assembly, and the auxiliary fuel cell stack is connected with the storage battery set after passing through the electric assembly. According to the liquid hydrogen fuel cell automobile power system capable of avoiding hydrogen leakage losses, intermittent discharging of hydrogen is avoided, volatiled hydrogen is fully utilized, energy waste is avoided, an automobile can travel by a certain distance through energy stored in the storage battery, and the situation that the automobile cannot travel due to the fact that all fuel is volatiled after the liquid hydrogen fuel cell automobile is parked for a long time is avoided.