The invention discloses an air conditioner filter for preventing and treating haze. The air conditioner filter for preventing and treating the haze comprises a filtering part, a catalyst part and an outer frame, wherein the filtering part and the catalyst part are separably stacked; the outer frame is used for fixing the edge of the filtering part and the catalyst part which are stacked; the catalyst part is made from a powdery catalyst and comprises a carrier, an active component and a promoter. After haze air is filtered by the air conditioner filter, PM2.5 particles, nitric oxides and sulfur oxides in are reduced to an extremely low level, air in a car is effectively purified, and the health of a respiratory system of a person in the car can be protected.