In　this　paper,　a　multi-layer　piezoelectric　structure　(MPS)　is　designed　as　a　sensor　with　multi-channel　and　high-output　properties.　It　is　bonded　onto　the　surface　of　a　cantilever,　and　then　the　FEM　modeling　and　simulations　are　developed.　The　mathematical　formulation　of　the　model　is　based　on　the　shear　deformation　beam　theory　because　of　the　large　thickness　of　MPS.　Furthermore,　the　FEM　model　is　obtained　based　on　the　Hamilton＇s　principle　and　the　finite　element　method.　The　effects　of　some　key　parameters　such　as　the　number　of　piezoelectric　layers,　the　thickness　of　per　piezoelectric　patch　and　that　of　per　adhesive　layer　are　analyzed　on　the　sensing　property　of　the　MPS.　Finally,　a　contrast　experiment　is　also　finished.　The　results　have　shown　that　this　novel　piezoelectric　structure　has　a　clear　sensing　advantage.　It　is　helpful　for　designing　the　piezoelectric　balance　sensor　or　the　piezoelectric　vibration　energy　harvesting　structure.