Rotation protection device for cantilever crane

The utility model relates to a rotation protection device for a cantilever crane. The device comprises a cantilever and a stand column which are connected to form a right angle, wherein a lifting tool is arranged at one end of the cantilever, and a traveling motor is arranged on the lifting tool and connected with an operating handle; a rotating motor is arranged on the stand column; stop iron is arranged on the cantilever, and an advance limiting position and a retreat limiting device are arranged respectively; an iron mounting rack is arranged in the advance limiting position, and the tail end of the iron mounting rack is connected with a travel switch; the advance limiting position is connected with an advance button node signal; the retreat limiting position is connected with a retreat button node signal, and the retreat button node signal is connected with a retreat contactor coil in series; a normally-closed node signal in the travel switch is connected with the advance button node signal and the advance contactor coil in series respectively; the advance button node signal and the retreat button node signal are connected in parallel and then connected with a control power supply P pole; the advance contactor coil and the retreat contactor coil are connected in parallel and then connected with a control power supply N pole. With the adoption of the device, the safety can be improved effectively.