Rope breakage protection device for lifting hook of tower crane

The utility model discloses a tower crane lifting hook broken rope protection device, which relates to the field of tower crane components, and comprises a fixed block and a lifting hook, the lifting hook is rotatably connected with a limiting plate, the limiting plate and the lifting hook are connected with a torsion spring, the top of the fixed block is fixedly connected with a connecting box, and the connecting box is connected with a mounting assembly for mounting a steel wire rope. The mounting assembly is connected with a protection assembly for preventing the steel wire rope from being broken, the two ends of the steel wire rope are symmetrically arranged in the connecting box, the mounting assembly comprises two mounting rollers, the steel wire rope is wound on the two mounting rollers at the same time, and each mounting roller is connected with the inner wall of the connecting box through a mounting shaft; a pressure bearing roller is arranged between the two mounting rollers and connected with a sup