Type MQ900/30 gantry crane is the new product developed and manufactured by our company together with Hangzhou Mechanical Research Institute and Sanmenxia Hydraulic Machinery Factory. It has the advantages of novel style, fine façade, light weight and simple erection. It has been widely used in the water conservancy, hydropower construction projects and production of enterprises. We provided six sets of the crane for Three Gorges project, which placed important role in the concreting of ship lock. The manufacture of this model of crane adopts circular gantry body with a new style flange connection. The height of gantry body can be determined as per the requirement of the clients. Its control system adopts frequency conversion speed regulation, which assures that the crane is under safe running. Its lifting arm can be alternatively longer or shorter and the lifting hook, 10T or 30T, is exchangeable. Thus, this gantry crane has an expanding operating scope and strong suitability to the environment.