The　rapid　acceleration　of　urbanization　has　a　serious　impact　on　the　urban　ecological　environment.　It　is　of　great　importance　to　carry　out　numerical　simulation　research　on　urban　spatial　thermal　environment　for　improving　urban　ecological　environment.　At　present,　there　are　few　studies　on　the　influence　and　accuracy　evaluation　of　different　vegetation　settings　in　computational　fluid　dynamics　(CFD)　on　the　simulation　results.　Aiming　to　quantify　impacts　of　vegetation　changes　and　vegetation　model　settings　on　the　numerical　simulation　of　urban　three-dimensional　thermal　environment,　this　study　1)　based　on　Gaofen-2　remote　sensing　data　and　CFD　model,　the　wind　and　heat　environment　at　the　block　scale　was　simulated　and　analysed;　2)　The　vegetation　model　is　assumed　to　be　three　models　including　cold　source,　constant　temperature　wall,　and　porous　medium.　Based　on　the　heat　transfer　and　cooling　mechanism　of　vegetation,　these　three　different　vegetation　models　and　their　related　CFD　parameter　settings　are　used　to　simulate　the　3D　spatial　thermal　environment.　The　research　results　show　that　the　distribution　of　temperature　has　a　great　correlation　with　the　direction　of　wind.　The　temperature　distribution　at　different　heights　at　night　did　not　show　significant　differences.　Due　to　the　obvious　convective　heat　transfer　between　the　building　surface　and　the　atmosphere,　the　temperature　in　the　upwind　direction　is　significantly　lower　than　that　in　the　downwind　direction.　At　a　height　of　2　m　and　below,　setting　the　vegetation　as　the　wall　model　has　the　best　performance,　and　at　a　height　above　5　m,　the　results　of　the　wind　and　heat　environment　of　the　three　setting　methods　are　basically　similar.　The　wind　environment　results　of　the　same　vegetation　setting　are　different　at　different　heights.