Using "chemical-physical" combined with low-temperature in-situ growth technology, a dense and uniform nano-TiO2 photocatalyst film can be grown on the surface of aluminum-based honeycomb to become honeycomb aluminum-based filter. The filter can produce hydroxyl radicals and superoxide radicals and other active species under the irradiation of light, these active species have the functions of antibacterial deodorization, organic matter removal, air purification, oil decomposition, mildew prevention, etc., which can be used for air purification, odor elimination, sterilization and disinfection, water purification, decoration dehyde removal, deodorization and other purposes.