The utility model provides a scraper conveyor returns coal cleaning device, forms confined transmission path including box (1) that is " returning " font structure, box, the four corners of box is provided with respectively including chain wheel group (2) of sprocket chain and sprocket axle (10), and the sprocket passes through the sprocket shaft to be connected, and a sprocket shaft wherein stretches out the outer one end of box and links to each other with the motor, is equipped with chain (3) rather than the meshing between the sprocket, the equipartition is equipped with scraper blade (4) on the chain, and its edge just contacts with the inner wall of box, lou coal mouth (6) are seted up to the box directly over scraper conveyor, leak to be provided with between coal mouth and the scraper conveyor to keep off coal board (8), return coal cleaning device interlude and install on scraper conveyor perpendicularly. The utility model discloses a returning coal clearance machineryization, having lightened scraper conveyor and because of the huge resistance that time coal deposits and bears the weight of, guaranteed scraper conveyor normal operating, its simple structure examines and repair and maintains the convenience with safeguarding, and is with low costs, efficient, convenient to popularize and use.