The invention relates to an electric power overhaul tool, and particularly to a tool fall prevention device for aerial works. The tool fall prevention device for aerial works comprises an operating rod, a top plate is connected to the top of the operating rod, a bottom plate corresponding to the top plate is arranged at a position close to the top plate on the operating rod, an internal thread hole is formed in the top plate, a threaded rod is connected to the internal thread hole through threads, a pressing plate is arranged on one end of the threaded rod close to the bottom plate, a limiting plate is hinged to the top plate, a limiting spring is connected between the limiting plate and the top plate, an anti-fall protection device is connected to the bottom of the operating rod througha connecting rope, the anti-fall protection device comprises a shell cover and a shell with an inner cavity, a piston is arranged on an inner wall of the inner cavity of the shell via slide connection, the piston divides the inner cavity into an upper cavity and a lower cavity, a connecting rod is connected to the piston, and a buffer spring is arranged in the lower cavity. The tool fall prevention device for aerial works provided by the invention has the advantages of simple structure and convenient use, and can effectively prevent tools from falling accidentally during the aerial works.