Jib crane is a kind of small and medium lifting equipment developed in recent years. It has the characteristics of flexible, high efficiency, energy saving, time saving, labor saving. It is supporting the use of the electric or manual hoist, can be operated optionally in three-dimensional space, and can show its unique advantages particularly in short-distance, intensive lifting areas compared to normal lifting equipments. This equipment is widely used in yards, workshops, warehouses and so on fixed places. Our factory owns the production qualification of under 16t (include) cantilever cranes in China.