Recycling　of　phosphorus　(P)　from　pyrolysis　sewage　sludge　is　a　good　methodology　to　deal　with　the　deficit　of　P　resources　and　safely　dispose　the　sewage　sludge.　However,　it　is　essential　to　determine　the　type　of　sludge　in　sewage　treatment　plants　(STPs)　along　with　the　most　appropriate　pyrolysis　temperature.　These　factors　affect　the　form　and　bioavailability　of　recoverable　P.　Thus,　four　kinds　of　sludge　in　a　typical　STP　were　selected,　and　three　pyrolysis　temperatures　including　300,　500,　and　700　?C　were　set　to　find　a　suitable　strategy　for　P　recovery.　The　results　indicated　that　with　increasing　pyrolysis　temperature,　more　organic　phosphorus　(OP)　was　transformed　into　inorganic　phosphorus　(IP)　and　more　non-apatite　inorganic　phosphorus　(NAIP)　was　converted　to　apatite　phos-phorus　(AP,　mainly　Ca-3(PO4)(2),　Ca(H2PO4)(2),　Mg-3(PO4)(2),　Ca3Mg3(PO4)(4),　and　Ca-5(PO4)3OH).　Compared　to　other　sludges,　dewatered　cake　sludge　(CS)　pyrolyzed　at　700　?C　had　the　highest　AP　content,　about　1.1-3.6　times　that　in　other　pyrolysis　products,　and　the　highest　Ca-5(PO4)(3)OH　content　containing　35.8%　of　total　phosphorus　(TP).　The　contents　of　P-2%　citric　acid　(CA)　and　neutral　ammonium　citrate　(NAC)　in　CS　obtained　by　pyrolysis　at　500　?C　reached　45.6　and　49.6　mg/g,　respectively,　which　were　1.1-3.0　and　1.1-2.8　times　that　of　P-CA　and　P-NAC　in　other　sludges　and　their　biochars,　respectively.　Moreover,　the　diethylenetriaminepentaacetic　acid　extraction　analysis　indicated　that　the　good　stability　of　heavy　metals　in　CS-derived　biochar　was　better　than　that　in　the　feedstock.　Hence,　to　ensure　the　efficiency　and　safety　of　P,　CS　is　used　as　raw　material　in　STPs　to　recover　P　re-sources.　CS-500　can　be　used　as　the　direct　P　source　of　land　owing　to　the　highest　concentration　of　bioavailable　P　(P　-CA　and　P-NAC),　while　CS-700　can　be　used　to　represent　a　slow-release　P　fertilizer　because　it　contains　the　highest　concentration　of　AP.