High-load hoister

A high-load hoister comprises a hoister case body, a motor, a turbine worm pair and a driving disk. A rope guide block is arranged at the lower end of the driving disk. A rope guide wheel is fixedly arranged at the left end of the rope guide block, which is arranged on the case body, and a rope pressing wheel is arranged at the right end of the rope guide block. A rope pressing spring of the rope pressing wheel is fixed on the case body. The left end at the lower part of a steel wire rope is jointed with the rope guide wheel and a guide wheel, and the right end at the lower part of the steel wire rope is jointed with the guide wheel and the rope pressing wheel. The steel wire rope is jointed with the driving disk, the rope guide wheel, the rope guide block and the rope pressing wheel into an omega shape. Two semicircular bodies symmetrically fixed by a shaft sleeve and an external surface are arranged on an output shaft of the motor, and are respectively jointed with a centrifugal speed limiter composed of a