Structural　topology　optimization　problems　are　studied　extensively　by　virtue　of　ICM　(independent　continuous　and　mapping)　method.　Sigmoid　function　in　artificial　neural　network　is　modified　and　used　as　a　polished　function,　and　it＇s　inverse　function　is　used　as　a　filter　function　for　structural　optimization　model.　In　this　way　can　the　optimization　model　be　translated　into　a　duel　programming　and　solved.　This　method　is　compared　with　power　function　which　is　used　in　structural　topology　optimization　in　the　past.　MSC.　Nastran　and　Patran　software　is　used　as　a　platform　to　realize　the　program　and　analyze　several　examples　which　verify　the　correctness　of　the　results.