Waste heat recovery device for motor of electric locomotive

The utility model discloses a waste heat recovery device for a motor of an electric motor car, which comprises a heat insulation sleeve made of heat insulation materials. The heat preservation cushion layer is adhered to the inner circumferential surface of the heat preservation sleeve, and the shape of the heat preservation cushion layer is matched with that of the heat preservation sleeve; the motor body is mounted in the heat preservation sleeve; the heat source port is formed in the outer circumferential face of the heat preservation sleeve, and an avoiding opening matched with the heat source port is further formed in the heat preservation cushion layer. When the motor is used, in the moving process of the moving plate, the moving plate can drive the reciprocating lead screw to rotate, the rotating reciprocating lead screw can serve as a power source, waste heat of the motor body can be utilized, the loss rate of heat in the heat preservation sleeve can be prevented, the heat generated during operation o