The utility model relates to an emergent boat screw protection device that charges, it includes the connecting rod, and the end of connecting rod sets up a grade pole, and the both sides of pin set up sawtooth blade. The utility model discloses install protection device around the screw, prevent foreign matter winding screw, avoid taking place screw external force and stop and shipwreck that leads to and the accident of hurting sb. 's feelings suddenly.