This　study　delves　into　the　nexus　between　the　efficiency　of　carbon　emission　allocation　and　the　efficiency　of　green　development　within　the　context　of　innovative　city　construction.　Leveraging　data　from　283　prefecture-level　cities　and　corresponding　provincial-level　panel　data　spanning　the　period　from　2005　to　2019　in　mainland　China,　the　research　employs　the　zero-sum　gain　DEA　model　to　compute　provincial　carbon　emission　allocation　efficiency　and　allocate　allowances.　Furthermore,　it　utilizes　the　all-factor　non-radial　directional　distance　function　and　the　SBMDEA　model　to　gauge　the　green　development　efficiency　of　prefecture-level　cities.　The　double-difference　method　is　applied　to　evaluate　the　impact　of　innovative　city　construction　on　regional　green　development　efficiency.　The　results　indicate　that　an　imbalance　between　carbon　emission　allocation　efficiency　and　emission　quotas　detrimentally　affects　urban　green　development.　However,　technological　progress,　factor　accumulation,　and　the　institutional　environment　associated　with　innovative　city　building　mitigate　this　negative　impact.　Heterogeneity　analysis　reveals　a　differentiated　effect　of　innovative　city　building　on　regional　green　development　efficiency.　This　paper　not　only　explores　the　concept　of　achieving　an　equitable　distribution　of　carbon　emission　allowances　but　also　examines　how　innovative　city　building　influences　regional　green　development.　By　establishing　connections　between　urban　policies,　the　equitable　distribution　of　carbon　emission　allowances,　and　regional　green　development,　it　introduces　a　new　perspective　for　promoting　high-quality　development　at　the　regional　level.