The　integration　of　economic　growth　and　environmental　sustainability　represents　a　critical　component　in　local　governments＇　implementation　of　Sustainable　Development　Goals　(SDGs).　Based　on　panel　data　from　276　cities　in　China　from　2005　to　2019,　this　study　examines　the　environmental　and　economic　impacts　of　low-carbon　governance,　specifically　focusing　on　carbon　mitigation,　air　pollution　reduction,　green　infrastructure　promotion,　and　economic　growth.　The　study　extends　to　potential　mechanisms　and　differential　performance　across　heterogeneous　characteristics　of　cities.　Empirical　results　demonstrate　that　enhancing　governmental　attention　to　low-carbon　governance　significantly　promotes　the　synergistic　advancement　of　economic　development　and　environmental　protection.　Through　mechanism　analysis,　technological　innovation　and　carbon　intensity　reduction　are　two　primary　channels　for　achieving　these　co-benefits,　while　industrial　transformation　shows　no　positive　contribution.　The　co-benefits　exhibit　variability　across　different　regions　and　city　classifications.　In　particular,　more　pronounced　effects　are　noted　in　the　eastern　and　central　regions,　cities　characterized　by　moderate　population　density,　and　those　not　reliant　on　resource　extraction.　These　findings　underscore　the　importance　of　strengthening　local　low-carbon　governance,　promoting　technological　innovation,　and　implementing　differentiated　policies　aligned　with　local　characteristics.