Analyzing　and　summarizing　the　evolution　characteristics　of　new　energy　vehicle　industrial　policies　can　provide　reference　basis　and　improvement　ideas　for　optimizing　the　design　of　policies.　This　paper　takes　the　437　new　energy　vehicle-related　industrial　policy　documents　issued　at　the　national　level　from　1997　to　2023　as　the　research　object,　and　analyzes　the　evolutionary　characteristics　of　industrial　policies　across　three　dimensions:　policy　quantity,　policy　tools,　and　policy　topics.　First,　the　policy　tools　are　applied　to　categorize　these　texts　into　supply-side,　environment-side,　and　demand-side.　Subsequently,　for　each　type　of　texts,　both　the　BERT　model　and　the　DTM　model　are　utilized　to　extract　semantic　and　thematic　features,　respectively,　and　then　the　distribution　of　their　topic　feature　words　is　obtained　through　dynamic　topic　modeling,　and　the　trend　of　the　topic　intensity　is　further　calculated　to　examine　the　evolutionary　characteristics　of　these　policies.　Finally,　based　on　the　above　analysis,　we　put　forward　optimization　suggestions　for　the　new　energy　vehicle　industry　policy.　©　2024　Copyright　held　by　the　owner/author(s).　Publication　rights　licensed　to　ACM.