Jib crane is mainly composed of top column, low column, main girder, main girder pole, electric hoist, rotation mechanism and electrical system, etc. jib crane work for light intensity, crane by post, rotating arm rotation drive device and electric hoist.Column bottom is fixed on the concrete foundation with anchor bolt. Cantilever rotary drive by cycloidal pinwheel reducer.Electric hoist on the cantilever beams as a straight line running from left to right, and lift heavy objects. Jib crane has the character of hollow steel structure, light weight, big span, lifting weight, economy and durable.Jib Crane is a new generation of the hoist equipment developed to meet the requirement of modernized production. Also,jib Crane adopts West Germany technology , has the features of reasonable structure, easy operating and high efficiency, etc . It is widely used in mines, workshop, warehouse , wharf.