The invention discloses an environmental-protection garbage can with a sterilization function. The environmental-protection garbage can with the sterilization function comprises a support base plate and an outer shell; a base is welded under the support base plate; a water pump is arranged in the base; a second connecting pipe is arranged on the upper surface of the water pump; a water storage tank is welded on one side of the water pump; a first connecting pipe is arranged in the connected place of the water pump with the water storage tank; a water inlet pipe is arranged on the upper surfaceof the water storage tank; an accumulator is arranged on the other side of the water pump; the outer shell is welded in the middle position of the upper surface of the support base plate; an ultraviolet sterilization lamp is arranged on the garbage can, so that users use the ultraviolet sterilization lamp for removing part of bacteria in the garbage can to prevent continuous breeding of the bacteria in the garbage can, and the garbage can is used more sanitarily; and secondly, a protective cover under the ultraviolet sterilization lamp is in absorption connection with a top cover through a limiting magnet, so that the users can directly take down the protective cover from the top cover, and are convenient to maintain and replace the ultraviolet sterilization lamp.