The utility model belongs to the design technology for mix power electric vehicle, especially relates to a biaxial four-wheel drive serial hybrid-power electric vehicle. The object is to conquer the problems that the current parallel type mixed power electric vehicle and parallel series type mixed power electric vehicle are complex in structure and the cost of the wheeled model motor in the scheme of series connected type for mix power electric vehicle is too high. The utility model is composed of a front drive axle, a rear drive axle, an engine, and an electric motor, the engine and a power generator are mechanically connected to form a generator unit, an electric motor is provided at the front drive axle and the rear drive axle respectively, an inverter is electrically connected with the power generator, the front electric motor, the rear electric motor and the accumulator battery respectively. The engine is also provided with a belt drive electric motor which is electrically connected to the inverter. The utility model is in favor of improving the pass property and maneuverability of the vehicle and the power generation functions of stopped or running vehicle, and of realizing pure electric schema. The utility model is further in favor of the refit of the existing four-wheel drive vehicles.