Abstract:The PD-1/PD-L1 pathway has been a research hotspot in the field of cancer in recent years. A large number of studies have shown that the PD-1/PD-L1 signaling pathway affects the infiltration and function of T lymphocytes and is involved in the local inhibitory immune microenvironment of tumors. Blocking this pathway can promote the proliferation and differentiation of immune cells in the microenvironment so as to exert the anti-tumor function. This paper discusses the research progress of PD-1/PD-L1 pathway in common gynecological malignant tumors.