In　order　to　realize　the　passive　vibration　monitoring　of　power　transformer,　a　vibration　energy　extraction　method　of　power　transformer　based　on　PMN-PT　piezoelectric　ceramic　series　and　parallel　structure,　is　proposed　in　this　paper.　The　piezoelectric　chip　collects　the　vibration　energy　of　the　power　transformer　and　converts　it　into　electrical　energy　to　supply　power　to　the　low-power　vibration　sensor.　At　the　same　time,　the　vibration　sensor　collects　the　surface　vibration　signal　and　uses　the　vibration　analysis　method　to　judge　the　operation　status　of　the　iron　core　and　winding.　The　experimental　and　simulation　results　showed　that　the　center　frequency　of　the　vibration　signal　of　the　power　transformer　was　concentrated　at　200　Hz,　and　the　vibration　amplitude　of　the　lower　part　of　the　transformer　was　the　largest;　The　actual　output　power　of　the　piezoelectric　energy　collection　device　was　greater　than　500　μW.　The　energy　recovery　control　circuit　could　greatly　improve　the　energy　recovery　power,　and　the　maximum　output　power　was　independent　of　the　load.　It　could　stably　provide　3.6　V　voltage　for　the　back　end,　which　was　enough　to　meet　the　power　supply　demand　of　the　vibration　sensor.　©　2022　IEEE.