The invention discloses a rear-end motor. The rear-end motor comprises a motor body, a one-way pneumatic oil gas valve, a cooling chamber, an oil pipe connector, a temperature sensor, coil stators, a rotor, roller bearings, a spindle, a commutator, electric brushes, an oil pipe, a shaft connector, a rear beam connection end and a heat conducting layer. The spindle is arranged in the motor body. Compared with the prior art, the rear-end motor has advantages that science and reasonability in design are achieved, and the requirement on a front-end space of an automobile is greatly met by design of the motor at the rear end; gasoline of the automobile is directly adopted for cooling, and the high-temperature gasoline is directly supplied to an engine through a gasoline circulation system, so that the gasoline utilization rate of the engine can be increased, and a great heat radiation effect of the motor in a high-temperature environment is achieved through oil cooling; due to small size, more space can be saved, and the rear-end motor can be widely applied to various places.