The invention discloses a heavy-duty bicycle anti-slide device. The heavy-duty bicycle anti-slide device comprises a rack guide mechanism, an electromagnet unit, a gear and a controller, wherein the rack guide mechanism is provided with a clamping groove where a supporting spring and a rack can be fixedly installed, one end of the spring is fixedly connected with the clamping groove, and the other end of the spring and one end of the rack are fixedly connected; the electromagnet unit is fixedly connected to one end of the rack guide mechanism, the other end of the rack is fixedly connected with a permanent magnet which can be attracted to and separated from the electromagnet unit; the gear can be engaged with the rack when rotating anticlockwise; the controller can control the electromagnet unit to be powered on or off according to heavy-duty bicycle dip angle information, the vehicle speed and gear information so as to achieve engagement and disengagement of the electromagnet unit and the permanent magnet. The invention further discloses a control method of the heavy-duty bicycle anti-slide device. The heavy-duty bicycle anti-slide device has the characteristics of being simple in mechanism design, convenient to install, high in operability, capable of greatly reducing cost, wide in practicability and the like when applied to a heavy-duty bicycle.