Lifting clamp for crane

The utility model discloses a hoisting clamp for a crane. The hoisting clamp comprises a rack, a clamping assembly, a pull rope assembly, a bottom supporting assembly and a driving assembly, the rack is in a circular ring shape and is vertically arranged. The multiple clamping assemblies are circumferentially distributed at the upper end of the rack and used for clamping and fixing workpieces. The pull rope assembly is arranged at the upper end of the clamping assembly and used for providing driving force for the clamping assembly. The bottom supporting assembly is arranged at the lower end of the rack and used for supporting the bottom of the workpiece. The driving assembly is arranged at the upper ends of the bottom supporting assemblies and used for driving the two bottom supporting assemblies to get close to each other. The device has the beneficial effects that after the height of a connecting block is increased, a first pull rope is pulled upwards, the first pull rope is turned through a first pulley an