Purpose:　In　order　to　optimize　SCSWIRC,　the　simplification　and　further　optimization　method　is　proposed.　SCSWIRC＇s　optimization　includes　two　levels.　The　first　level　refers　to　simplifying　structural　system　from　the　perspective　of　components;　the　second　level　refers　to　optimizing　components＇　sectional　areas　from　the　perspective　of　mechanics.　The　first　level　aims　to　remove　redundant　components,　and　the　second　level　aims　to　reduce　structural　self-weight　based　on　the　first　level.　The　purpose　of　the　paper　is　to　simplify　SCSWIRC＇s　structural　system　and　optimize　structural　self-weight　and　reduce　construction　forming　difficulty.　Design/methodology/approach:　Grid-jumping　layout　and　multi-objective　optimization　method　is　used　to　simplify　and　further　optimize　Spatial　cable-truss　structure　without　inner　ring　cables　(SCSWIRC).　Grid-jumping　layout　is　used　to　simplify　remove　redundant　components,　and　multi-objective　optimization　method　is　used　to　reduce　structural　self-weight.　The　detailed　solving　process　is　given　based　on　grid-jumping　layout　and　multi-objective　optimization　method.　Findings:　Take　SCSWIRC　with　a　span　of　100m　as　an　example　to　verify　the　feasibility　and　correctness　of　the　simplification　and　further　optimization　method.　The　optimization　results　show　that　12　redundant　components　are　removed　and　the　self-weight　reduces　by　3.128t　from　original　scheme　to　grid-jumping　layout　scheme　1.　The　self-weight　reduces　from　36.007t　to　28.231t　and　feasible　coefficient　decreases　from　1.0　to　0.627　from　grid-jumping　layout　scheme　1　to　multi-objective　optimization　scheme.　The　simplification　and　further　optimization　can　not　only　remove　the　redundant　components　and　simplify　structural　system　to　reduce　construction　forming　difficulty,　but　also　optimize　structural　self-weight　under　considering　structural　stiffness　to　reduce　project　costs.　Originality/value:　The　proposed　method　firstly　simplifies　SCSWIRC　and　then　optimizes　the　simplified　SCSWIRC,　which　can　solve　the　optimization　problem　from　the　perspective　of　components　and　mechanics.　Meanwhile,　the　optimal　section　solving　method　can　be　used　to　obtain　circular　steel　tube　size　with　the　optimal　stiffness　of　the　same　areas.　The　proposed　method　successfully　solves　the　problem　of　construction　forming　and　project　cost,　which　promotes　the　application　of　SCSWIRC　in　practical　engineering.　©　2022,　Emerald　Publishing　Limited.