In　order　to　study　the　effect　of　different　structural　parameters　on　the　connection　performances　of　a　tapered　head　sleeve　(THS)　and　the　calculation　method　of　the　bond　strength,　a　three-dimensional　finite-element　model　was　established.　Seventeen　THS　specimens　with　different　specifications　were　designed　and　simulated.　Considering　the　inner　cavity　radius,　sleeve　thickness,　sleeve　length,　and　anchorage　length　of　reinforcing　bar,　the　influence　law　of　each　parameter　on　THS　deformation　was　analyzed.　According　to　the　restraint　mechanism　and　the　law　of　circumferential　strain　distribution,　the　calculation　methods　of　bond　strength　between　the　grouting　material　and　the　inner　cavity　of　the　grouting　sleeve　and　between　the　steel　bar　and　the　grouting　material　are　put　forward.　The　results　show　that　the　longitudinal　strain　of　the　sleeve　increases　with　decreasing　the　radius　of　the　sleeve　and　the　thickness　of　the　sleeve;　the　decreases　of　sleeve　lengths　and　anchorage　lengths　affect　the　strain　distribution　trend　of　the　whole　sleeve,　but　have　no　obvious　effect　on　the　peak　value　of　the　longitudinal　strain　and　circumferential　strain;　the　formulas　well　express　the　bond　strength　between　each　part.