In　this　paper,　a　kind　of　limestone　compound　active　agent　(LCAA),　which　can　greatly　increase　the　strength　of　blended　limestone　cement　was　introduced.　For　example,　52.5　MPa　clinker　can　generate　42.5　MPa　cement　containing　30%　limestones　by　mass　when　LCAA　was　used　in　the　cement.　Simultaneously,　LCAA　also　had　good　effects　on　the　strength　increment　of　limestone　mineral　admixture　concrete.　Moreover,　the　shrinkage　property　of　concrete　was　obviously　decreased　by　adding　lime　stone　admixture.　Therefore,　limestone　had　good　future　as　mineral　admixture　in　cement　and　concrete.