The invention relates to a processing method and a product of a customized antibacterial and antiviral photocatalyst filter core, and belongs to the application field of a photocatalysis technology. The method is characterized in that photocatalyst dispersion liquid is uniformly loaded on inorganic fiber felt manufactured by continuous protofilaments; then, glass fiber felt is cut into a shape matched with a steel mesh model sleeve and is loaded in the steel mesh model sleeve to be roasted at 450 to 650 DEG C; organic matters are decomposed; photocatalysts are sintered on the inorganic fiber to form an inorganic fiber based compound filter material; then, the compound filter material is transferred into a non-light tight filtering unit casing and is assembled into a customized filter coreof a filter together with a communicated positioning mechanism. The manufacturing method is suitable for industrial production, can be used in various kinds of filtering and purification equipment oroccasions.