Automobile air conditioning filter

The invention provides an automobile air conditioning filter. The filter comprises a fixed frame, a composite filter layer and an HEPA filter screen layer, wherein the composite filter layer and the HEPA filter screen layer are sequentially arranged in the fixed frame according to the air intake direction; the composite filter layer is of a honeycomb structure filled with functional filler including activated carbon, antibacterial molecular spheres and TOP formaldehyde-removing particles. According to the automobile air conditioning filter, the sealing performance of an air conditioning filter can be remarkably improved, benzene, formaldehyde, VOC and TVOC can be effectively removed, pathogenic bacteria can be effectively killed, the effect for filtering particulate matters 2.5 (PM2.5) is good, and formaldehyde can be catalytically oxidized into carbon dioxide and water. The filter is safe and environment-friendly, has a long service life, and can be used for releasing 'air vitamin', namely negative ions, to the air to achieve an effect of maintaining and protecting health. Furthermore, the filter can be used for monitoring the air quality in a vehicle, and guiding a vehicle owner whether the air in the vehicle should be purified or not.