Coal countercurrent wet magnetic separator

The utility model relates to a coal countercurrent wet magnetic separator which is used for solving the technical problems such as difficulty in mine unloading, high content of impurities in dense medium and the like caused by magnetic force increment of the traditional magnetic separator because the dense medium is stuck to the surface of a drum. The coal countercurrent wet magnetic separator is additionally provided with a tank body structure comprising an arc plate and an arc throttle plate; the arc plate is fixed under a magnetic cylinder, and a distance is remained between the arc plate and the wall of the magnetic cylinder; the arc throttle plate is fixed at the inclined downside of the magnetic cylinder, close to one side of a feeding pipe, and a distance is remained between the arc throttle plate and the wall of the magnetic cylinder; and a feeding channel is arranged between the arc throttle plate and the arc plate. When entering the tank body structure, rare medium is changed from laminar flow to tu