The invention discloses a series mixing power system and belongs to the power equipment of the communication transportation. The system comprises the engine, the generator, the electromotor, the accumulator, the energy recycling equipment and the control system. Because the driving device of the engine adopts at least two generators, so it can joint and separate the engine and adapt the output load of the engine to the outside load, and control the engine in the high-efficient area to improve the efficiency of the mixing power system.