Lifesaving device for ship

The utility model provides a lifesaving device for a ship. The lifesaving device solves the problem that life safety is threatened due to the fact that the body temperature of people falling into water floats on the water for a long time. A propeller is arranged at one end of the shell, the shell is provided with an air bag cavity, a heating cavity and a power source bin, the heating cavity is annular, a heating pipe is arranged in the heating cavity, a heat insulation plate is arranged between the heating cavity and the air bag cavity, and a heat conduction plate is arranged on the other side of the heating cavity. People falling into water can be located in the annular ring of the heating cavity and heated through the heating pipe in the heating cavity, then temperature is transmitted to the people falling into water through the heat conducting plate, stable heat is provided for the people falling into water, meanwhile, the propeller can push the people falling into water to move so that the people falling