The invention discloses a non-woven filter cloth for an air conditioner. The non-woven filter cloth is prepared from, by weight, 40-60 parts of tea polyphenol fiber, 30-60 parts of linen fiber, 20-40 parts of bamboo charcoal fiber, 5-12 parts of multifunctional polyester fiber, 10-20 parts of an antibacterial agent and 10-24 parts of a finishing agent. According to the non-woven filter cloth for the air conditioner, the antibacterial agent and the finishing agent are added, and by pasting the antibacterial agent and the finishing agent on the outer surface of the non-woven filter cloth, the non-woven filter cloth achieves antibacterial and bacteriostatic effects; the linen fiber and the bamboo charcoal fiber are adopted, the linen fiber is high in moisture absorption and heat dissipation speed, health care capability, anti-corrosion capability and bacteriostatic capability, resistant to fouling, static electricity and ultraviolet light and good in flame retardant effect, the bamboo charcoal fiber has the advantages of being superhigh in adsorption capacity, capable of emitting far-infrared rays and high in negative ion emission concentration, and therefore the non-woven filter cloth obtained through weaving achieves the antifouling, antistatic, anticorrosion and bacteriostatic effects; by adding the tea polyphenol fiber, the antibacterial performance of the non-woven filter cloth is effectively improved.