Crane with double-limiting protection function

The utility model relates to the field of crane equipment, in particular to a crane with a double-limit protection function, and aims to solve the problems that a rope hammer is easy to wind with a lifting steel wire rope to cause a shutdown fault in the use process of a currently used heavy hammer limiter. The crane with the double-limit protection function solves the problems that when a heavy object ascends, a lifting appliance easily swings, so that the top of the lifting appliance swings out of the size limit of a counter weight lever of a limiter, the limiter fails to act, and a height limiter loses efficacy, and the crane with the double-limit protection function is provided. The two ends of the electrode plate make contact with the two ends of the conductive plate, and electrodes at the two ends of the electrode plate are not conductive, when the lifting tool ascends to the set highest point, the conductive plate and the electrode plate are disconnected, and then the lifting tool loses power and canno