The invention discloses an idler belt conveyor, which comprises an installation base, on which a working mechanism and a heating idler are arranged; wherein, the working mechanism includes middle legs, straight rollers, and side legs; the The middle outrigger is fixedly installed in the middle of the upper surface of the installation base; the two side outriggers are symmetrically installed in the edge position of the upper surface of the installation base; the side outriggers are rotatably connected with heating rollers through bearings. The present invention can dissolve the ice layer by arranging heating rollers, avoiding the problem that water falls on the surface of the belt and easily forms an ice layer, thereby reducing the friction coefficient of the belt, which is not conducive to the stable transportation of materials. The mechanism can scrape off the dirt on the surface of the heating roller, and can avoid the abnormal deformation of the outer circumference of the roller. In severe cases, it will cause the deviation of the conveyor belt and cause the change of the material conveying line, ensuring the normal use of the belt conveyor. .