with　the　continuous　acceleration　of　urban　and　town　construction,　the　output　of　urban　and　town　sewage　is　also　increasing.　To　a　great　extent,　this　promotes　the　technological　development　and　capacity　expansion　of　urban　and　town　sewage　treatment　plants.　In　the　process　of　sewage　treatment,　a　lot　of　sludge　is　inevitable.　However,　many　urban　and　town　sewage　treatment　plants　pay　more　attention　to　the　treatment　of　sewage　and　ignore　the　treatment　of　sludge.　In　this　way,　the　sludge　without　proper　treatment　can　be　disposed　at　will.　In　the　long　run,　this　will　not　only　affect　the　surrounding　environment,　but　also　hinder　the　development　of　social　economy.　Therefore,　the　urban　and　town　sewage　treatment　plant　should　pay　enough　attention　to　the　application　of　surplus　sludge　treatment　and　disposal　technology.　In　this　paper,　the　main　problems　existing　in　the　treatment　and　disposal　technology　of　surplus　sludge　in　urban　and　town　sewage　treatment　plants,　and　the　treatment　and　disposal　technology　of　surplus　sludge　in　urban　and　town　sewage　treatment　plants　are　both　explored　and　analyzed,　hoping　to　contribute　to　the　long-term　development　of　urban　and　town　sewage　treatment　plants.　©　The　Authors,　published　by　EDP　Sciences,　2020.