Pipe conveyor belt is new type of conveying belt which uses belt carcasses (EP fabric, Steel cordand etc). as skeleton, high elastic, high anti-arasive and high strength rubber as working surface. They are mainly used in conveying powdery and granular materials and etc. That are pollutive to the environment. When working, the rubber belt changes its form flat to U shape and finally to pipe shape, folding the materials and realizing the process of enclosed conveying.