The invention belongs to the technical field of hoisting mechanical equipment, in particular to a novel lifting hook lock. The novel lifting hook lock comprises a connecting base; a first steel cableis fixedly connected with the center of the top of the connecting base; a set of rotary plates are rotationally connected in an opening of the connecting base; second steel cables are hinged to the parts, close to the outer edges, of the rotary plates; and the ends, away from the rotary plates, of the second steel cables are fixedly connected with lifting hooks. Through cooperation of a stop dog,the rotary plates, a rotary ring, a second stop dog, a through hole, an adjusting bolt, a strong spring, a first shifting block, a twisting block and a second shifting block, a sliding block in a sliding hole is struck, thus, a driving hammer on the sliding block is driven to strike a copper gong so as to generate alarm sounds, operators are reminded of overweight of lifted workpieces, and casualties caused by workpiece slipping due to lifting hook overweight are avoided.