The　authors　propose　a　novel　dynamic　intrusion　detection　scheme　for　cluster-based　wireless　sensor　network　to　find　the　intrusion　in　the　network.　Multiple　attributes　of　the　sensor　nodes　are　taken　into　consideration　in　our　scheme.　Our　scheme　sets　different　detection　parameters　for　different　clusters　and　different　time.　Our　algorithm　adjusts　the　parameters　dynamiclly　and　improves　the　accuracy　and　the　false　alarm.