Rope falling prevention device for fixed pulley of crane

The utility model discloses a rope dropping prevention device for a fixed pulley of a crane, which comprises a protective cover, a steel wire rope for hoisting a heavy object and a dropping prevention mechanism for preventing the steel wire rope from dropping, the anti-falling mechanism comprises a first fixing shaft arranged on the protective cover, a fixed pulley arranged on the first fixing shaft in a sleeving mode and two fixing blocks arranged at the two ends of the first fixing shaft. According to the anti-falling device, the protective cover, the first fixing shaft, the fixed pulley, the fixing blocks, the sliding cavity, the sliding rod, the spring, the second fixing shaft and the anti-falling rolling wheel are arranged; the problems that in the using process of a hoisting mechanism of existing small hoisting equipment, under the normal condition, a steel wire rope is hidden in a wheel groove, sometimes, the steel wire rope jumps out of the wheel groove, after the steel wire rope is disengaged, the st