Magnesia-phosphate　cement　(MPC)　is　a　new　type　of　excellent　repairing　material,　and　its　short　setting　time　has　great　influence　on　its　engineering　wide　application.　In　this　paper,　on　the　basis　of　Borax　retarder,　and　according　to　the　high　hydration　heat　release　characteristic　of　MPC,　low　temperature　phase　change　material　(PCM)　of　CaCl2　center　dot　6H(2)O　was　chosen　to　improve　the　performances　of　MPC.　The　results　indicated　that　the　performances　of　MPC　have　been　greatly　optimized　by　adding　the　PCM　of　CaCl2　center　dot　6H(2)O.　For　instance,　the　PCM　can　decrease　the　hydration　rate,　prolong　the　setting　time,　and　reduce　the　content　of　harmful　pore,　and　also　it　can　improve　the　strength　of　MPC.　Nevertheless,　when　the　dosage　of　PCM　is　more　than　1.5%,　the　strength　and　flow-ability　of　MPC　will　be　decreased.　Taking　all　aspects　into　consideration,　the　best　performance　of　MPC　is　when　the　PCM　dosage　is　at　1.5%.　(C)　2017　Elsevier　Ltd.　All　rights　reserved.