The invention discloses a filtering net composite material for an air purifier. The filtering net composite material is characterized by containing the following raw materials in parts by weight: 5-10 parts of nano-copper, 5-10 parts of nano-zinc oxide, 10-15 parts of nanometer titania aqueous dispersion with the concentration of 40%, 60-80 parts of acetone, 2-5 parts of an epoxy resin, 1-5 parts of poly-1,4-diphenylbutadiyne and 30-40 parts of activated carbon fibers. The filtering net composite material for the air purifier, disclosed by the invention, contains metal nano-copper, nano-zinc oxide and nanometer titania and has the effects of filtering, inhibiting and killing bacteria and removing formaldehyde. The composite material is excellent in PM2.5 filtering effect, high in formaldehyde removal rate, wide in types of inhibited and killed bacteria, long in service life, safe and environment-friendly. Meanwhile, the preparation method provided by the invention is low in material cost, readily available in raw materials and simple and clear in process and has high practical value and excellent application prospects.