Characteristics　and　constraint　mechanism　of　concrete　confined　by　ties,　concrete　filled　steel　tube,　FRP-strengthened　concrete　were　summed　up　in　this　paper,　and　unified　bearing　capacity　model　for　confined　concrete　was　also　introduced,　Abstract:　In　this　study,　one　new　function　is　defined　as　change　of　relative　crystallization　degree　in　unit　time　and　named　relative　crystallization　rate　(1/min.).　The　curve　of　heat　flow　rate　to　time　is　transmitted　to　that　of　to.　The　produced　curve　was　fitted　using　one　high-order　polynomial　equation　with　a　variable　of　and　the　coefficient　vector　(Ai　,in　this　paper,　the　values　of　i　were　from　0　to　9)　was　produced.　It　was　found　that,　even　during　the　accelerated　stage　of　crystallization　from　PET　melt,　both　aspects　to　promote　and　delay　the　relative　crystallization　rate　existed,　furthermore,　both　aspects　of　promotion　and　delay　declined　with　the　crystallization　process　and　appeared　＂internal　exhaustion＂.then　several　new　kinds　of　confined　concrete　forms　were　outlined,　finally　the　development　and　application　of　confined　concrete　were　prospected.