Water purifier with sterilization and disinfection functions

The water purifier comprises a water purifier body, a water storage tank is formed in the upper portion of the interior of the water purifier body, and a sterilization and disinfection tank is formed in the lower portion of the interior of the water purifier body. Water is conveyed into the water storage tank through a water inlet pipe, then a motor is started, the motor is started to drive a rotating rod to rotate, and the sterilization and disinfection tank is arranged in the water storage tank; a rotating rod rotates to drive a first ultraviolet lamp, fan blades and an activated carbon adsorption plate to rotate, the first ultraviolet lamp, the fan blades and the activated carbon adsorption plate rotate to achieve the effects of killing bacteria in water in a water storage tank in a large range and adsorbing impurities in the water, and a first electromagnetic valve is opened to enable the water to enter a cold water pipe; water is uniformly irradiated by a second ultraviolet lamp at a short distance after