Rope-breaking safety device for steel wire rope of tower crane trolley

The utility model relates to a rope-breaking safety device for a steel wire rope of a tower crane trolley. The rope-breaking safety device comprises a rotating stop lever and a boom, wherein the rotating stop lever is provided with a rotating hole, the rotating stop lever can rotate around a rotating shaft arranged in the rotating hole in a penetrating manner, the rotating stop lever is provided with a first end and a second end, the second end of the rotating stop lever is a stringing end, a stringing hole is formed on the second of the rotating stop lever and used for allowing the steel wire rope of the trolley to be threaded so as to limit the rotation of the rotating stop lever; when the trolley steel wire rope is broken, the limitation on the second end of the rotating stop lever is automatically relieved, the rotating stop lever rotates, and when the first end of the rotating stop lever collides with an inclined strut and a cross rod below the boom, the trolley stops walking. The safety device is charac