Waste gas treatment packed tower capable of being automatically cleaned

The utility model discloses a waste gas treatment packed tower capable of being automatically cleaned, which belongs to the technical field of waste gas treatment, and comprises a packed tower main body, a medicament barrel, a circulating water tank and a circulating water pump, an air inlet is formed in one side of the bottom of the packed tower main body, an electric valve is arranged in the air inlet, and an air outlet is formed in the top of the packed tower main body. A demister, an upper-layer spray head, an upper-layer filler, a lower-layer spray head and a lower-layer filler are sequentially arranged in an inner cavity of the packed tower main body from top to bottom, the medicament barrel is communicated with the circulating water tank through a dosing pump, and the circulating water tank is communicated with the spray heads through the circulating water pump; a packed tower water outlet is formed in the bottom of the packed tower main body, a water drainage electromagnetic valve is arranged in the p