Spent　LiFePO4　batteries　are　gradually　increasing　in　popularity　and　interest,　and　their　stable　and　insoluble　olive-shaped　structure　poses　a　great　challenge　for　the　sustainable　recycling　of　Li.　In　this　study,　a　simple　and　sustainable　Ca(ClO)(2)　system　was　proposed　for　the　recovery　of　spent　LiFePO4　battery　cathode　materials.　The　effects　of　both　mechanochemical　activation　and　hydrometallurgical　enhanced　leaching　on　the　deconstruction　of　LiFePO4　and　the　leaching　rates　of　Li　and　Fe　in　the　Ca(ClO)(2)　system　were　studied.　Compared　with　mechanochemical　activation,　Ca(ClO)(2)-assisted　hydrometallurgical　enhanced　leaching　can　simultaneously　achieve　the　separation　and　enrichment　of　the　target　components　Li+　and　Fe3+　and　the　Ca2+　impurities.　The　transformation　path　and　reaction　mechanism　of　LiFePO4　in　the　Ca(ClO)(2)　system　were　proposed　based　on　the　phase　composition　and　micromorphology　of　the　reaction　products.　In　addition,　the　economic　evaluation　results　show　that　Ca(ClO)(2)-assisted　hydrometallurgical　enhanced　leaching　has　a　high　recovery　economy.　The　developed　Ca(ClO)(2)　system　realizes　the　strong　dissolution　of　spent　LiFePO4　battery　cathode　materials　and　the　sustainable　comprehensive　recovery　of　valuable　components.