Mobile belt conveyor is a kind of machine that to transfer the material continuously. It works under the effect of frictional force. It is not only the compo nents to transfer the material, but also the components to transfer the force. The Belt Conveyor is advanced and simple in structure, easy to maintain. Its transfer capacity is high, transfer distance is long. They are widely used in mining, metallurgical and coal industry to transfer sandy or lump material, or packaged material. In many situation, it Is a very important component of nonstandard machinery.