The drum conveyor is suitable for transporting different boxes, bags, pallets and other items with heavy loads. Small or irregular items need to be placed on pallets or in turnover boxes for transportation. It can transport materials with a large single weight and withstand large impact loads. The roller lines are easy to connect and filter, and can be used in complex logistics transportation systems composed of multiple roller lines and other conveyors or specialized machines to complete various process needs. Ethnic rolling can be used to achieve material stacking and transportation. The roller conveyor has a simple structure, high reliability, and convenient use and maintenance.