With　the　widespread　use　of　lithium　iron　phosphate　batteries　in　various　industries,　the　amount　of　waste　lithium　iron　phosphate　batteries　is　also　increasing　year　by　year,　and　if　not　disposed　of　in　a　timely　manner,　will　pollute　the　environment　and　waste　a　lot　of　metal　resources.　In　the　composition　of　lithium　iron　phosphate　batteries,　the　cathode　has　an　abundance　of　elements.　The　ultrasonic　method　is　a　crucial　method　to　recover　waste　LiFePO4　batteries.　It　has　the　following　disadvantages,　such　as　the　lack　of　empirical　parameters　and　suitable　research　equipment.　In　order　to　overcome　the　inefficiency　of　the　LiFePO4　recycling　method,　the　airborne　bubble　dynamical　mechanism　of　ultrasound　in　the　removal　of　lithium　phosphate　cathode　material　was　studied　by　a　high-speed　photographic　observation　and　Fluent　simulation　and　the　disengagement　process.　Mainly　aimed　at　the　parameters　such　as　action　time,　power,　frequency,　and　action　position　in　the　detachment　process　were　optimized.　The　recovery　efficiency　of　lithium　iron　phosphate　reached　77.7%,　and　the　recovered　lithium　iron　phosphate　powder　has　good　electrochemical　properties,　with　the　first　charge-discharge　ratio　of　up　to　145　(mAh)/g.　It　is　shown　that　the　new　disengagement　process　established　in　this　study　was　adopted　for　the　recovery　of　waste　LiFePO4.