Automatic crane safety monitoring device

The utility model discloses a safety monitoring device for an automatic crane, which relates to the technology of construction equipment and aims to solve the dangerous situation that a hoisted object is extremely easy to fall off once a sling drives the hoisted object to greatly shake together, and adopts the technical scheme that the safety monitoring device is characterized in that a motor is fixedly connected onto a cross rod, and a take-up reel is fixedly connected onto a rotating shaft of the motor; a connecting rope is wound on the take-up reel, the other end of the connecting rope is fixedly connected to the lifting hook, a metal ring arranged on the outer ring of the sling in a sleeving mode is arranged on the cross rod, the metal ring is electrically connected and connected with a starting circuit electrically connected with the motor, and the starting circuit receives a starting signal generated when the metal ring makes contact with the sling and controls the motor to start. The motor is provided