Alternating-current variable-frequency electric traction coal car

The utility model discloses an alternating-current variable-frequency electric traction coal car which comprises a front car body and a rear car body, the front car body comprises a front car frame, acable winding roller, an electric control box, a variable-frequency motor, a speed reducer, a front driving wheel, a rear wheel driving hydraulic pump, a hydraulic pump station and a cab, and the cable winding roller is installed in the middle of the front side of the front car frame. The electric cabinet is installed on the left portion of the front side of the front frame, the variable frequency motor, the speed reducer and the rear wheel driving hydraulic pump are all arranged in the middle of the front frame, a rotating shaft of the variable frequency motor is connected with the speed reducer, and a first output shaft of the speed reducer is connected with a front driving wheel. The automatic cable winding and unwinding device has the beneficial effects that the cable winding roller is arranged, a power suppl