The invention discloses a wave floating energy self-generating life jacket which comprises a life jacket, wherein a floating energy rectifier module, an electricity generating energy storage module and a functional module are arranged on the life jacket; the floating energy rectifier module can be used for converting irregular wave vibration mechanical energy into the rotating mechanical energy of an output shaft, so that a generator can be stably driven to work; the electricity generating energy storage module can be used for processing and storing the electricity generated by the generator in a battery and intelligently distributing the electric energy according to the requirements; the electric appliance load in the function module can realize the corresponding function through the electricity generating energy storage module, such as a carbon fiber heating film, a GPS position emitter, a shark preventer, a rescuing signal lamp, and the like; the life jacket can automatically adjust the temperature of the drowning people according to the external environment and can prolong the surviving time of the drowning people in seawater, so that the rescuing probability of the victim is greatly increased; when the device does not fall into water, the floating energy rectifier module and the electricity generating energy storage module are attached to the back of the life jacket.