A　test　of　10　scaled　models　was　performed　on　double　steel　plates　and　concrete　infill　composite　shear　walls　for　nuclear　engineering,　and　the　influence　of　several　parameters　including　the　thickness　of　the　steel　plate,　stud　spacing,　vertical　load,　stiffener　on　in-plane　flexural　behavior　of　double　steel　plate　and　concrete　infill　composite　shear　walls　(SCSW)　were　studied　based　on　the　test　results.　The　results　indicate　that　the　thickness　of　the　steel　plate,　vertical　load　and　stiffener　all　have　a　great　effect　on　the　in-plane　flexural　behavior　of　SCSW　while　the　stud　spacing　has　little　impact.　The　SCSW　specimens　were　simulated　by　using　the　finite　element　software　ABAQUS.　It　is　found　that　both　the　finite　element　calculation　values　and　the　test　values　of　the　flexural　behavior　of　SCSW　had　a　good　agreement,　but　the　curves　of　the　finite　element　calculation　did　not　have　apparent　declination.　Combined　with　the　experimental　results　and　finite　element　numerical　simulation,　a　calculation　formula　of　flexural　behavior　of　SCSW　was　proposed.　This　study　provides　a　theoretical　basis　for　the　design　and　application　of　composite　shear　walls　with　double　steel　plates　and　filled　concrete.　©　2017,　Engineering　Mechanics　Press.　All　right　reserved.