Smart　grid　has　a　great　advantage　over　the　traditional　power　grid　and　it　is　a　critical　condition　in　people＇s　daily　life.　The　security　of　data　communication　in　smart　grid　is　important　and　needs　to　be　efficiently　guaranteed.　The　supervisory　control　and　data　acquisition　(SCADA)　systems　is　in　charge　of　supervising　the　sensitive　process.　In　SCADA　systems,　the　secure　communication　between　control　center　and　remote　terminal　units　can　be　achieved　by　the　key　distribution　mechanism.　However,　the　remote　terminal　units　are　resource-constrained　and　sometimes　are　not　available　so　that　they　cannot　receive　the　session　key　updating　broadcast.　Self-healing　is　an　efficient　mechanism　to　calculate　missing　session　keys　by　using　later　broadcast　messages.　In　this　paper,　we　propose　an　efficient　self-healing　group　key　distribution　scheme　for　SCADA　systems.　The　security　analysis　illustrates　that　our　scheme　satisfy　the　basic　security　properties　defined　in　security　model.　According　to　the　performance　evaluation　from　storage　and　communication　cost　viewpoints,　the　proposed　scheme　is　efficient.