Co-incineration　is　one　of　the　best　ways　to　treat　sewage　sludge　(SS)　and　municipal　solid　waste　(MSW),　but　it　is　very　important　to　understand　its　combustion　and　gas　reaction　in　the　grate　to　control　the　emission　of　pollutants.　In　this　paper,　the　discussion　of　SS　co-incineration　based　on　the　dioxin　emission　numerical　simulation　model　for　the　MSW　incineration　(MSWI)　process　is　proposed.　Firstly,　the　numerical　simulation　model　of　DXN　emission　for　the　MSWI　process　is　established　in　ASPEN　Plus　software　by　using　collected　sample　data　in　an　MSWI　plant　in　Beijing.　Then,　the　SS　and　MSW　co-incineration　numerical　simulation　model　is　constructed.　Finally,　based　on　SS　data　in　reference,　the　discussion　and　analysis　are　made.　These　research　results　provide　support　for　the　future　research　on　co-incineration　of　SS　and　MSW　in　Beijing.　©　2024　IEEE.