The　vibration　of　power　transformer　is　closely　related　to　the　mechanical　condition　of　transformer　and　current　when　the　external　short　circuit　occurs.　In　this　paper,　the　vibration　sensors　based　on　piezoelectric　effect　are　attached　to　the　oil　tank　of　transformer　to　acquire　the　vibration　signals　in　short　circuit　condition,　and　then　the　transfer　function　is　applied　to　study　the　relationship　between　the　vibration　and　short-circuit　current　under　multiple　short　circuit　shocks.　Compared　with　traditional　frequency　domain　or　time-frequency　domain　analysis,　this　method　can　normalize　the　vibration　in　different　short　circuit　condition　and　clearly　illustrate　the　relationship　between　vibration　and　current.　The　conclusion　shows　that　this　method　is　feasible　to　evaluate　the　mechanical　condition　of　transformer　by　using　the　correlation　analysis　of　amplitude　frequency　characteristic　of　transfer　function　in　different　short　circuit　condition.