The Zhejiang Chengshi U-shaped intelligent lifebuoy is propelled by a jet pump, and there is no exposed propeller structure. The propulsion is safe and will not cause secondary injury to the people who fall into the water. At the same time, it can effectively avoid the risk of water weeds and other debris entangled with the propeller; the high-density filter design can block Various impurities in water with a diameter of ≥1mm.