To　further　improve　the　green　tax　system　and　enforce　the　responsibility　of　dischargers,　the　Environmental　Protection　Tax　Law　was　formally　launched　on　January　1,　2018.Using　empirical　data　from　A-share　listed　companies　spanning　2007　to　2022,　this　paper　analyzes　how　environmental　tax　system　reforms　impact　the　quality　of　corporate　green　innovation.　The　empirical　results　indicate　that　(i)　the　environmental　tax　system　reform　can　motivate　enterprises　to　improve　the　quality　of　corporate　green　innovation　(ii)　the　environmental　tax　reform　can　boost　corporate　green　innovation　quality,　especially　in　weak　market　systems　under　rigorous　media　oversight(iii)　the　implementation　of　environmental　tax　reform　enhances　enterprises’　innovation　incentives　and　improves　the　quality　of　environmental　information　disclosure.　As　such,　it　has　a　favorable　impact　on　corporate　green　innovation.　The　effectiveness　of　tax　reforms　in　promoting　green　innovation　can　be　significantly　enhanced　through　the　government　subsidies.　©　2025　Informa　UK　Limited,　trading　as　Taylor　&　Francis　Group.