The　testing　of　concrete　filled　steel　tubular　(CFST)　latticed　columns　with　initial　stress　had　been　conducted　under　axial　load.　The　set-ups　subjected　to　initial　stress,　the　curves　of　load　to　deformation　as　well　as　the　hooping　effect　were　analyzed.　The　trial　results　indicate　that　the　CFST　columns　with　initial　stress　have　smaller　of　combined　stiffness　and　ultimate　load-carrying　capacity　as　compared　with　CFST　columns　without　initial　stress.　Furthermore,　the　presence　of　initial　stress　will　advance　the　coming　of　plastic　phase,　and　contemporary,　put　off　the　appearances　of　hooping　effect　so　that　it　cannot　be　sufficient　exerted,　which　decrease　the　ultimate　load-carrying　capacity　at　all.　Nevertheless,　the　mechanical　behaviour　of　lacing　tubes　does　not　vary　with　the　initial　stress　and　all　the　lace　tubes　are　stayed　in　the　elastic　phase　during　the　testing.