Multifunctional inflatable life jacket for ship

The utility model discloses a multifunctional inflatable marine life jacket which comprises a life jacket body, a waistline air bag and a neck air bag are arranged on the life jacket body, and the shoulders of the life jacket body are connected with a GPS (global positioning system) positioner and an alarm signal lamp; a left chest electrothermal film is clamped at the left chest position of the life jacket body, a right chest electrothermal film is clamped at the right chest position of the life jacket body, and a positioning alarm switch, a temperature controller and a battery are connected to the life jacket body; the positioning alarm switch comprises a reed pipe fixing sleeve, a reed pipe is fixedly installed in the reed pipe fixing sleeve, a magnet and a magnet sliding sleeve are installed outside the reed pipe fixing sleeve in a sliding mode, and the magnet is embedded in the magnet sliding sleeve. The life jacket body sequentially comprises nylon cloth, an aluminum laminated film, lining cloth and a n