Telescopic conveyor (also known as telescopic loader), which can be freely stretched in the length direction, and the length of the conveyor can be controlled at any time. It can transport materials in two directions, and the operation end can be lifted and lowered, so that it can be used in conjunction with other conveying equipment and material sorting systems to realize automatic production of materials in and out of warehouses or vehicle loading and unloading, and has been widely used in various industries.