In　this　paper,　the　band　structure　and　transmission　characteristics　of　asymmetric　locally　resonant　complex　phononic　crystals　are　studied.　Based　on　the　Bragg　band　gap　mechanism,　an　asymmetric　local　resonance　element　was　designed　and　the　structural　parameters　were　optimized　to　obtain　a　wide　band　gap.　The　results　show　that　the　range　of　the　first　complete　band　gap　is　obviously　affected　by　the　size　of　the　scatterer,　the　radius　and　height　of　the　locally　resonant　cylinder　and　the　position　of　the　cylinder.　At　the　same　time,　the　transmission　characteristics　of　the　10∗10　periodic　arrangement　structure　are　calculated　to　verify　the　accuracy　of　the　energy　band　structure.　©　Published　under　licence　by　IOP　Publishing　Ltd.