The working strength of the jib crane is light. The crane is composed of a column, a slewing arm slewing drive device and an electric hoist. The lower end of the column is fixed on the concrete foundation by anchor bolts. The I-beam of the jib can be used to run left and right in a straight line, and to lift heavy objects. The crane jib is a hollow steel structure, with light weight, large span, large lifting weight, economical and durable. Built-in traveling jib crane MODE type walking mechanism, using special engineering plastic walking wheels with rolling bearings, low friction, light and fast walking; small structure size, especially conducive to improving the hook stroke.