To　study　the　influence　of　woods　on　electric　field　distribution　of　500kV　EHV　Transmission　lines,　the　Solidworks　software　was　applied　to　create　the　simplified　model　of　500kV　transmission　lines,　and　the　ANSYS　software　based　on　finite-element　method　was　applied　to　calculate　space　electric　field　intensity　of　transmission　lines.　This　paper　chooses　the　electric　field　intensity　of　transmission　lines　and　span　central　cross　section　as　the　research　object.　The　calculation　result　shows　that　the　maximum　electric　field　intensity　is　about　1808v/m　without　woods　and　1916v/m　with　12m　high　woods　and　2055v/m　with　16m　high　woods　in　the　middle　of　the　span　cross　section　20　meters　high　above　the　ground.　Woods　around　transmission　lines　can　distort　the　space　electric　field　of　lines,　and　the　higher　of　woods,　the　larger　of　the　maximum　of　electric　field　over　the　woods.　And　using　the　method　of　unmanned　aerial　vehicle　(uav)　carrying　measuring　instruments　to　measure　the　cases　with　woods　and　without　wood,　respectively,　and　compare　which　with　the　calculation　results　to　find　that　results　of　analysis　are　in　agreement　with　the　experimental　datas　basicly.This　paper　studies　the　space　electric　field　intensity　distribution　of　transmission　lines　under　different　height　and　location　of　woods,　such　can　provide　preference　for　reasonable　erection　of　500kV　EHV　transmission　lines.　©　2016　SERSC.