With　the　rapid　development　of　the　lithium-ion　battery　industry,　safe　disposal　of　spent　LiFePO4　batteries　(SLFPBs)　has　gradually　become　a　focus　of　attention.　However,　the　stable　olivine　structure　of　LiFePO4　prevents　decon-struction　and　separation　of　the　elements　Li,　Fe　and　P.　Mechanochemical　activation　proved　to　be　an　effective　and　environmentally　friendly　method　for　phase　deconstruction.　An　efficient　recycling　method　involving　(NH4)2S2O8-　assisted　mechanochemical　activation　and　water　leaching　is　reported　herein　for　the　deconstruction　of　SLFPBs.　The　results　indicated　that　advanced　oxidation　of　the　(NH4)2S2O8　and　synergistic　mechanical　forces　accelerated　the　deconstruction　of　the　LiFePO4　mineral　phase.　Efficient　leaching　of　the　Li　and　targeted　enrichment　of　the　Fe　and　P　were　achieved　simultaneously　while　preserving　the　olivine　structure.　Under　the　optimal　conditions,　the　leaching　efficiency　for　Li　was　95.3%,　and　the　leaching　efficiencies　for　Fe　and　P　were　both　less　than　1.5%.　A　Li2SO4　purity　of　98.8%　was　obtained　by　evaporative　crystallization　and　roasting.　A　1.0　kg　scale-up　experiment　showed　that　an　economic　profit　of　$4.768　was　generated　by　recycling　1.0　kg　of　SLFPBs.　This　inexpensive,　green　and　sustainable　recycling　method　shows　great　potential　for　industrial　planning.