The conical lifting roller is mainly based on the DTⅡ type manual. Two conical rollers are respectively installed on their own rotating frames. The two rotating frames achieve synchronization through a link mechanism. The crossbeam is directly connected to the intermediate frame. When the belt deviates, it drives the rotating frame to rotate around the rotating shaft by a certain angle. At this time, the self-aligning idler applies a lateral thrust F1 to the belt, prompting the deviated belt to return to its original position, realizing automatic correction of the deviated belt and ensuring the belt runs in alignment.