Metal foam has the characteristics of large specific surface area, good ductility and high thermal conductivity, and has good hydromechanical properties. It has very significant advantages in catalytic reactions of gases and liquids. In the catalytic reaction, a foamed nickel-based or copper-based metal can be directly used as a catalyst, or a foamed metal can be used as a catalyst carrier, and other catalysts can be attached to the surface layer. The composite photocatalytic foam metal tip nanocomposite technology integrates the excellent characteristics of nanophotocatalytic materials and nickel foam, and is a supported photocatalytic functional material obtained by uniformly loading a certain amount of nano-Tio2 on the foamed nickel substrate. Nickel foam can be used as an excellent photocatalyst because of its unique three-dimensional network structure. It has broad application prospects in three-way catalysis of automobile exhaust, medical chemical reactions, degradation of organic pollutants in wastewater, removal of harmful inorganic gases and air purification.