The action mechanism and application progress of partial denitrification-anammox and denitrifying phosphorus removal technologies are reviewed,the enrichment strategies and characteristics of functional microorganisms are summarized,and the research progress in the coupling between these two technologies is analyzed.The development trend and research direction in the future are prospected,aiming to provide references for the research and improvement of partial denitrification-anammox and denitrifying phosphorus removal technologies,and their coupling process.