The invention provides a preparation method of a hollow nano bowl-shaped structure, a nano material and application. Firstly, a hollow copper nano bowl-shaped structure is obtained through magnetron sputtering and plasma etching, light is irradiated on the hollow copper nano bowl, the chemical interaction between adsorption molecules and the metal surface can be enhanced, comprising chemical bond enhancement, surface hybridization resonance enhancement, phonon-induced charge transfer enhancement and the like. The composite nano structure grows on a silicon wafer, local surface plasmon polaritons on the composite structure are excited through light irradiated on the composite structure, and transfer of charges in the nano structure is accelerated through hot electrons, hot holes and chemical energy excited by metal local surface plasmon polaritons, so that the catalytic efficiency is improved, and the catalysis of CO2 is enhanced through the surface plasmon polariton effect of gold and copper. The preparation cost is low, the preparation process is simple, and the method can be effectively copied and applied on a large scale.