The roller line is made of roller (galvanized, stainless steel, PVC, polyurethane and other materials) as the conveying medium, with guide rails on both sides, which can directly push the transported goods by hand, or use the motor as the source power to complete the conveying. If the process requirements are met, it can also be customized as stacking conveying. The transported object can be directly placed on the upper surface of the roller or equipped with tooling plate for conveying. The series of roller lines are easy to connect and filter. A complex logistics transportation system can be composed of multiple roller lines and other transportation equipment or special machines to fulfill various process needs. The roller line has simple structure, high reliability and convenient use and maintenance.