In　order　to　provide　the　fundamental　data　for　sludge　utilization　as　fertilizer,　six　phthalic　acid　esters　(PAEs)　which　are　classified　as　environmental　endocrine　disrupters　in　Beijing　sewage　sludges　were　studied　with　GC-MS.　The　range　of　total　mass　fraction　of　PAEs　in　dried　sludge　was　from　2.08　×　10-5　to　5.82　×　10-5.　The　distribution　characteristics　of　PAEs　in　sewage　sludge　from　five　wastewater　treatment　plants　were　alike,　in　which　di-2-ethylhexyl　phthalate　(DEHP)　was　predominant,　accounting　for　more　than　90　percent　of　total　mass　fraction　of　PAEs.　The　factors　affecting　the　types　and　mass　fractions　of　PAEs　in　sewage　sludge　included　physical-chemical　properties　and　biodegradability　of　PAEs,　methods　of　wastewater　and　sludge　treatment,　sources　and　concentrations　of　PAEs　in　wastewater.