The utility model discloses a mobile quenching car, which comprises a quenching box, an electromotor, a speed reducer, a frame basket, a circulating cooling box, a refrigerator and an electric control cabinet, wherein wheels are arranged at the bottom of the quenching box; the electromotor and the speed reducer are arranged at the top of the quenching box; an output shaft of the speed reducer is fixedly connected with the center part of the frame basket in the quenching box; the circulating cooling box, the refrigerator and the electric control cabinet are also arranged outside the quenching box; the bottom in the circulating cooling box is communicated with the bottom in the quenching box; a circulating pump and a heat exchanging pipe are arranged at the bottom in the circulating cooling box; an outlet of the circulating pump is connected with a pipeline which is communicated to the upper part in the quenching box; two ends of the heat exchanging pipe are respectively connected with the refrigerator; and the electromotor, the refrigerator and the circulating pump are respectively connected with the electric control cabinet through cables. The mobile quenching car solves the problem that the traditional quenching equipment is not suitable for quenching operation in a laboratory because the quenching quality cannot be guaranteed and has the advantages of movement flexibility, convenience for operation, safety and the like.