The invention discloses a belt pressing and cleaning device, so that the problems that a belt of a belt conveyor at a concave place of a transportation roadway is prone to floating, and materials adhering to the surface of the belt are difficult to clear away are solved. The device comprises a roller supporting frame, a carrier roller supporting frame and a clearing unit. Two upper belt rollers are mounted on the roller supporting frame; a column of anti-slanting adjusting carrier rollers are mounted on the carrier roller supporting frame; the clearing unit is composed of a rotary shaft, a clearing roller provided with a clearing bristlebrush, a motor and a reducer; and the clearing unit is mounted below an unloading point of the roller supporting frame. The belt pressing and cleaning device is scientific in design, simple in structure, convenient to operate and good in belt pressing and cleaning effect. According to the belt pressing and cleaning device provided by the invention, the two rollers form a fake device head, the effect of belt pressing is achieved, power of the cleaning device is transmitted through the motor and the reducer, drive cleaning is conducted on the belt, the clearing unit performs drive clearing with independent power, roller rotating is adopted, roller rotating and belt moving are opposite in direction, the area of contact with the belt is increased, accordingly abrasion is reduced, and the clearing bristlebrush adopts an abrasion resistant material, so that the service life is long.