The high-power spacecraft power system is the developing trend. The distributed spacecraft power system with the advantage of feasibility and scalability fulfills the high power requirement. The reliability of distributed spacecraft power system is crucial. The high reliable architecture with multiple buses of distributed spacecraft power system is proposed in this paper. The reconfiguration strategy and operation mode of the system is designed. Then, the seamless mode transfer is achieved when different faults occur. The reliability of the distributed spacecraft power system is improved. Finally, the effectiveness of control strategy is verified.