In　order　to　solve　the　data　transmission　security　problem　of　the　sensing　network,　this　paper　proposes　a　multi-level　trusted　clustering　mechanism.　The　proposed　mechanism　combines　multi-level　clustering,　identity　authentication,　and　trusted　computing　to　solve　network　expansion　problems,　reduce　energy　consumption　when　ordinary　nodes　transmit　data　to　aggregation　nodes,　and　ensure　that　the　identity　of　IOT　nodes　and　the　messages　are　trusted.　According　to　the　routing　protocol,　each　sensor　node　uses　a　multi-level　clustering　algorithm　to　divide　each　node　into　multiple　levels　of　clusters.　Then　it　transmits　two-way　identity　authentication　and　platform　integrity　authentication　to　ensure　the　identity　of　nodes　is　trusted.　Finally,　it　adopts　a　key　distribution　management　method　based　on　vector　space　to　manage　keys.　Logic　analysis　and　experimental　results　show　that　the　proposed　scheme　has　a　high　malicious　attack　resistance　rate　and　a　small　amount　of　computation,　which　reduces　the　energy　consumption　of　the　IOT　nodes　during　transmission　and　ensures　the　security　of　the　transmitted　messages.　©　2019,　Springer　Nature　Singapore　Pte　Ltd.