Air purification and disinfection device

The invention discloses an air purification and disinfection device, relates to the field of air purification, and solves the problems that when an existing air purification and disinfection device is used, the surface of a main filter element is easily covered and blocked by large-particle dust, and the purification effect and the service life of the filter element are influenced. A filter element support used for fixing the main filter element is fixedly connected to the base, a fixing ring is fixedly connected to the top end of the filter element support, a water tank used for storing disinfectant is fixedly connected to the top end of the fixing ring, the water tank is sleeved with an inner protective shell, and an outer protective shell is rotationally connected to the outer portion of the inner protective shell. According to the air purification and disinfection device, the service life of the main filter element can be prolonged conveniently, the replacement frequency and cost are reduced, the pore dia