Electric hoist gantry crane is a small and medium-sized hoisting equipment that runs on rails. The mechanism runs along the lower flange of the I-beam of the main beam during operation. The gantry structure is divided into two types: box shape and truss. The box shape has good technology and is easy to manufacture; the truss has light weight and strong wind resistance. The whole machine has the characteristics of light weight, simple structure, convenient installation and maintenance, etc. It is suitable for general loading, unloading and lifting work in factories, mines, freight yards, warehouses and other outdoor places within the range of small and medium lifting capacity.