Cantilever crane

The invention relates to the technical field of engineering machinery, in particular to a cantilever crane. The cantilever crane comprises a vertical column, a cantilever, a supporting frame, loop chain hoists, a lifting appliance and a fixing assembly, wherein the cantilever is rotatably connected to the vertical column; the supporting frame is arranged on the cantilever and can move in the length direction of the cantilever; the loop chain hoists are mounted on the supporting frame; the lifting appliance is mounted on the loop chain hoists and is driven to rise and fall by the loop chain hoists; the fixing assembly is fixedly connected to the upper end of the lifting appliance; when the lifting appliance is drawn by the loop chain hoists to a limited position, the fixing assembly is connected with and fixed to the supporting frame, so that the lifting appliance is relatively fixed to the supporting frame; the situation that in the lifting transportation process, the lifting appliancesways is effectively avo