The invention discloses a coal dressing magnetic dense medium powder magnetism strengthening device, and solves the economic waste problem caused by technical loss in the prior art in recovery of coal dressing magnetic dense medium powder when the coal dressing magnetic dense medium powder is poor in magnetism. The coal dressing magnetic dense medium powder magnetism strengthening device comprises a working platform, an outer cover is placed on the working platform, the outer cover is provided with a material bin arranged on the working platform, the outer sides of the left and right side walls of the outer cover are provided with pulse magnetic field generators, the inner sides of the pulse magnetic field generators are provided with magnetic guide layers which are arranged in the left and right side walls of the outer cover, the inner sides of the side walls of the outer cover and the working platform are provided with electric heating rods, the inner side of the upper wall of the outer cover is provided with an infrared generator, and the outer cover is provided with an exhaust valve. The coal dressing magnetic dense medium powder magnetism strengthening device is reasonable and reliable in structural design, the electric heating rods are matched with infrared auxiliary heating, and coal dressing magnetic medium powder is processed by use of a pulse magnetic field, so that the magnetism is improved, the recovering effect is good, and the device has a higher economic efficiency.