Voltage　sag　is　one　of　the　most　common　power　quality　disturbances　in　industry,　which　causes　huge　inrush　current　in　the　windings　of　induction　motors,　and　adversely　impacts　the　motor＇s　secure　operation.　For　better　understanding　of　the　operation　and　protection　of　induction　motors,　there　is　a　need　for　a　detailed　research　of　the　transient　characteristics　of　induction　motors　during　sag　events.　In　this　paper,　we　first　proposed　a　novel　2-D　multi-slice　field-circuit-motion　coupling　time-stepping　finite　element　method　(2-D　multi-slice　FCM　coupling　T-S　FEM)　for　calculating　the　transient　performance　of　the　induction　motor　with　skewed　rotor　bars.　In　the　proposed　method,　the　equations　of　field,　circuit,　and　motion　are　expressed　in　a　nodal　matrix　and　coupled　together.　Based　on　this　method,　we　have　analyzed　the　electromagnetic　properties　of　a　5.5-kW　induction　motor　with　skewed　rotor　bars　under　symmetrical　voltage　sag　conditions.　Then,　the　influences　of　voltage　sag＇s　sag　magnitude,　phase-angle　jump,　and　initial　phase　angle　on　the　stator　inrush　peak　currents　of　the　5.5　kW　and　a　55-kW　induction　motors　is　studied.　Finally,　the　proposed　method　is　compared　with　3-D　FEM,　the　traditional　2-D　multi-slice　FEM　and　the　measured　data.　The　results　show　that　the　proposed　method　can　reduce　the　computation　time　significantly　with　high　precision.