To　study　the　aseismic　performance　of　uniform　sectional　concrete-filled　steel　tubular　(CFST)　lattice　columns　with　flat　lacing　tubes,　the　quasi-static　tests　are　conducted　for　seven　test　specimens　focused　on　the　effects　of　different　concrete　strength,　longitudinal　spacing　of　CFST　limbs,　and　vertical　spacing　of　lacing　tubes　on　stiffness,　strength,　and　ductility.　The　hysteretic　behaviors　of　specimens　are　also　simulated　with　a　fiber　model　using　OpenSees　platform,　and　the　results　obtained　by　fiber　element　model　agree　well　with　test　results.　By　analyzing　the　damage　modes,　the　load-displacement　hysteretic　loops,　the　skeleton　curves,　and　the　following　conclusions　can　be　derived.　All　the　specimens　have　a　good　aseismic　performance,　characterized　by　the　overall　bending　damage;　and　the　horizontal　load-displacement　hysteresis　curves　are　plump;　with　the　increase　of　concrete　strength　from　C40　to　C60,　the　bearing　capacity　is　improved　by　5.7%;　as　the　longitudinal　spacing　of　CFST　limbs　increased　from　250　mm　to　650　mm,　the　bearing　capacity　and　the　ductility　factor　are　significantly　improved　by　14.5%　and　6.8%;　as　the　vertical　spacing　of　lacing　tubes　increased　from　200　mm　to　313　mm,　the　bearing　capacity　and　the　ductility　factor　are　respectively　reduced　by　12.9%　and　12.0%.　©　2016,　Engineering　Mechanics　Press.　All　right　reserved.