A　novel　pretreatment　approach　combined　freeze　with　microwave　was　developed　to　promote　the　release　of　orthophosphate　from　excess　sludge,　and　the　phosphorus　(P)　was　recovered　from　the　produced　supernatant　by　phosphate　sedimentation.　Batch　tests　examined　the　effects　of　freezing　time,　pH,　and　microwave　time　on　the　release　of　phosphate　(PO43--P)　of　the　excess　sludge　during　the　freezing-microwave　pretreatment.　The　release　amount　of　PO43--P　reached　276mg/L　under　the　conditions　of　the　freezing　time　of　23h,　microwave　time　of　5min,　and　pH　of　4.　The　optimal　conditions　for　phosphate　precipitation　were　pH　of　9.5,　the　mole　ratio　of　Mg/P　of　1.8,　and　stirring　speed　of　200rpm.　The　recovery　efficiency　of　PO43--P　reached　97.42%　after　the　reaction　of　20min　and　the　precipitation　of　50min.　The　precipitated　sediment　mainly　consisted　of　amorphous　calcium　phosphate　and　magnesium　ammonium　phosphate　(MAP)　which　can　be　used　as　a　substitute　for　phosphorus　minerals.