Vehicle-mounted variable-size pit slot milling equipment

The utility model provides vehicle-mounted variable-size pit slot milling equipment. The vehicle-mounted variable-size pit slot milling equipment comprises a base, a vertical mechanical arm, a horizontal mechanical arm, a bearing arm, a milling device outer cover, a rotary motor, a sliding device, a motor and a milling motor, the base used for being fixed to the maintenance truck is hinged to one end of the vertical mechanical arm. The other end of the vertical mechanical arm, the horizontal mechanical arm and one end of the bearing arm are sequentially hinged, and the other end of the bearing arm is hinged to the top of the milling device outer cover and used for lifting the milling device outer cover. The rotary motor is arranged in the milling device outer cover, the output end of the rotary motor is connected with the sliding device, and a motor for driving the sliding device to move is arranged at one end part of the sliding device; the other end of the sliding device is connected with a milling motor, a