Abstract: In the paper,the recent developments of perovskite/copper indium gallium selenide tandem solar cells are delved deeply,highlighting the advantages of this technology in terms of both efficiency and reliability. The developments of perovskite/copper indium gallium selenide tandem solar cells from the perspectives of process optimization,structure co-design,and performance improvement are summarized. The complex synergistic effect of each subunit device in the tandem structure is emphatically discussed.