This　study　proposes　an　innovative　ethylenediaminetetraacetic　acid　disodium　salt　(EDTA-2Na)　pretreatment　strategy　for　simultaneous　methane　and　phosphorus　(P)　recovery　from　waste　activated　sludge　(WAS).　Pretreatment　with　7.5　mmol/L　EDTA-2Na　disrupted　sludge　floc　structures　via　metal-chelating　effects,　enhancing　shortchain　fatty　acids　(SCFAs)　by　1.4-fold　and　methane　production　by　1.3-fold　during　anaerobic　digestion.　After　EDTA-2Na　pretreatment,　48.9　%　of　total　phosphorus　(TP)　was　released　from　the　sludge　in　the　methaneproduction　phase,　and　in　the　phosphorus　recovery　phase,　another　32.3　%　of　TP　was　released　under　the　synergistic　promotion　of　EDTA-2Na　pretreatment　and　acidification.　Recovered　P　crystallized　as　vivianite　with　81.1　%　efficiency　and　73.1　%　purity.　This　approach　demonstrates　sustainable　sludge　management　by　integrating　methane　and　P　recovery　through　EDTA-2Na　pretreatment　in　anaerobic　digestion.