The invention belongs to the technical field of air purification, and particularly relates to a PM2.5 filtering air purification material and a preparation method thereof. The purification material is prepared from the following raw materials in parts by weight: 79 to 95 parts of camellia oil seed residue carbide, 5 to 9 parts of tea saponin, 10 to 25 parts of graphene, 1 to 5 parts of tea polyphenol and 200 to 500 parts of de-ionized water. The air purification material has the functions of filtering PM2.5 and clearing away harmful gas in air; the filtering rate on the PM2.5 is as high as 99.2 or higher; meanwhile, the purification efficiencies on harmful gass of formaldehyde and benzene in the air are respectively as high as 95.3 percent or higher and 92.7 percent or higher.