With　the　proposal　of　the　concept　of　carbon　peaking　and　carbon　neutralization,　the　development　of　low-carbon　economy　has　become　a　consensus.　In　order　to　deal　with　a　series　of　environmental　problems　caused　by　the　greenhouse　effect,　countries　all　over　the　world　have　begun　to　take　actions　to　develop　the　new　energy　industry.　Under　the　background　of　China＇s　＇14th　Five-Year　Plan＇and　innovation　driven　strategy,　the　new　energy　industry　has　become　a　strategic　emerging　industry　to　accelerate　development　and　innovation.　At　the　same　time,　the　government　also　adopts　financial　subsidy　policies　actively,　in　order　to　help　new　energy　enterprises　improve　their　independent　innovation　ability,　but　this　method　is　still　controversial.　According　to　the　above　background,　The　heterogeneous　impact　of　government　subsidies　on　technological　innovation　in　new　energy　firms　will　be　investigated　in　this　research.　It　shows　that　government　subsidies　have　an　overall　positive　influence　on　the　technological　innovation　of　new　energy　firms.　The　influence　of　government　subsidies　on　new　energy　technology　innovation　is　more　remarkable　in　large　and　medium-sized　firms,　according　to　the　heterogeneity　analysis,　the　effect　on　new　energy　technology　innovation　in　the　eastern　region　is　more　clear.　©　2022　ACM.