The invention discloses a deep sea oil-charging motor capable of automatically removing water, and the motor comprises a motor body and a water removing system connected with the motor body. A side, far from an output shaft, of a rotor of the motor body is provided with an axial hole and a radial hole, so as to generate pressure difference in the axial and radial directions when the rotor rotates. The water removing system comprises an oil incoming pipe, an oil outgoing pipe, and a water removing unit, so as to enable oil liquid to circulate in the water removing system when the motor operates, thereby removing the water in the oil liquid. The motor provided by the invention can remove seawater in the oil liquid, increases the underwater working time, and is simple and reliable in structure.