Wireless　sensor　networks　have　been　used　widely　in　many　application　fields,　whereas　such　applications　as　battlefield　information　obtaining,　disaster　survivor　rescuing,　etc.　need　an　immediate　and　fast　route　that　is　simultaneously　secure　and　energy-efficient.　In　this　paper,　by　constructing　a　neighbor　table,　we　build　a　tree-structure　route　that　can　meet　all　the　above　requirements　for　the　large-sized　wireless　sensor　networks　with　only　a　resource-constrained　sink　node.　Our　proposed　routing　scheme　has　salient　features:　light　overhead,　quick　formation,　and　immediate　effectiveness.　We　also　adopt　some　effective　energy-conserving　measures,　such　as　data　aggregation,　node　sleep,　sink　move　and　parent　reselection,　etc.,　to　prolong　the　lifetime　of　wireless　sensor　networks.　We　show　through　experiments　that　our　routing　scheme　can　ensure　adequately　the　security　and　energyefficiency　of　the　route　request　message　and　the　sensing　data.　©　2011　ACADEMY　PUBLISHER.