Over-unwinding prevention structure for hoisting steel wire rope of crane

The utility model relates to the technical field of cranes, and discloses a crane winding steel wire rope over-unwinding prevention structure which comprises a main body mechanism and a supporting mechanism, and the supporting mechanism is located below the main body mechanism. The main body mechanism comprises a connecting frame, a movable lantern ring, a mounting seat, a wiring port, a movable groove, a movable block and a trigger button, the movable lantern ring is movably mounted at the outer end of the connecting frame, the mounting seat is fixedly mounted at the upper end of the movable lantern ring, and the wiring port is formed in the front end of the mounting seat in a penetrating manner; the movable groove is fixedly arranged at the top of the interior of the wiring port, the movable block is movably installed in the movable groove, and the trigger button is fixedly installed at the top of the interior of the movable groove. According to the over-unwinding prevention structure for the hoisting steel