Nitrogen is a necessary element for biosome. However, the molecular nitrogen can’t be directly used because of the extremely strong triple bond. It must be converted into ammonia or nitrogen oxide at first for biological assimilation. To date, the artificial nitrogen fixation is dependent on the Haber-Bosch method, which is carried out at high temperature and high pressure. It consumes substantial energy and releases enormous greenhouse gases. In the context of the global energy crisis and increasing greenhouse effect, it is urgent to explore green nitrogen-fixation strategies. Photocatalytic nitrogen fixation is one of the most promising green nitrogen fixation methods. In comparison with traditional semiconductor photocatalysts whose light absorption is limited by the band gap, the light absorption of localized surface plasmon (LSP) nanostructures can be tuned by varying the size and aspect ratio, and thereby LSP can realize broadband response and strong absorption to solar light. Hence, plasmonically photocatalytic nitrogen fixation attracts extensive attention recently. This review gives an overview of fundamentals, recent progress, and future perspective of plasmonically photocatalytic nitrogen fixation.