The　structure　of　the　new　double　asymmetric　liquid　crystal　lens　is　improved　on　the　basis　of　the　single　round　hole　electrode　liquid　crystal　lens.　Combined　with　geometrical　optics　and　liquid　crystal　theory,　Zemax　is　used　to　simulate　and　optimize　the　parameters　of　this　double　layer　structure　liquid　crystal　lens.　Zemax　analysis　results　show　that　in　the　same　low　drive　voltage　(in　the　range　of　2.5Vrms　to　20Vrms)　and　at　the　angle　of　view　with　0°,　3.5°and　5°,　the　double　layer　structure　lens　has　wider　focusing　range　than　the　single　layer　structure　lens.　The　short　focal　length　reduces　from　19.6172　mm　to　9.9059　mm.　The　aberration　is　significantly　reduced.　When　the　optical　modulation　transfer　function　(MTF)　is　0.6,　the　radial　direction　resolution　increases　from　12.06　lp/mm　to　21.02　lp/mm,　almost　doubled.　The　image　resolution　and　clarity　are　significantly　improved.　The　high　frequency　part　MTF　increases　from　0.1　to　0.3.　Finally,　the　experiment　verifies　that　the　diffraction　specular　of　the　double　layer　structure　liquid　crystal　lens　is　the　smallest　at　20Vrms.　©　2017,　Chinese　Lasers　Press.　All　right　reserved.