Phosphorus　(P)　is　considered　a　non-renewable　resource.　Owing　to　the　increasing　consumption　of　phosphorus　in　daily　life,　the　＂P　crisis＂　is　imminent.　To　address　this　crisis,　it　is　urgent　to　find　new　phosphorus　resources.　This　paper　summarizes　the　research　progress　of　P　recovery　based　on　vivianite　formation　from　waste.　Specifically,　the　advantages　and　disadvantages　of　optimizing　the　Fe　source　and　pH　in　waste-activated　sludge　(WAS)　and　the　co-fermentation　of　WAS　and　food　waste　are　analyzed.　Thereafter,　the　advantages　and　disadvantages　of　increasing　the　Fe　dosage　in　full-scale　wastewater　treatment　plants　is　discussed　and　an　optimization　scheme　is　proposed　on　this　basis.　By　analyzing　the　advantages　and　disadvantages　of　comparative　experimental　results,　two　recovery　methods　are　proposed　to　recover　a　large　amount　of　P　(＞=　83%　total　P)　as　high-purity　vivianite　(＞=　93%).