The invention discloses a fishing light comprising a shell, a water addition battery, a yellow LED light and a white LED light. Both the water addition battery and the LED lights of two colors are arranged inside the shell, the LED lights are connected with the water addition battery, and the shell is further provided with a water filling nozzle. A battery unit of the water addition battery comprises a water absorbing layer and a bipolar plate, the water absorbing layer is attached to the outer side of an air cathode of the bipolar plate, the bipolar plate comprises a metal anode plate, corrugated aluminum foil and the air cathode overlapped in sequence, and the corrugated aluminum foil is clamped between the metal anode plate and the air cathode. The corrugated aluminum foil is electroconductive and waterproof, a corrugated passage is further constructed into an air passage, diffusibility of air inside the battery can be improved, discharge performance of the battery is further improved, and current density and discharge power of the battery are increased.