Cold-formed　steel　is　widely　used　in　steel　structures,　especially　in　transmission　towers,　because　of　advantages　such　as　low　weight,　high　strength,　excellent　mechanical　properties,etc.　However,　there　is　not　a　special　design　code　for　cold-formed　steel　use　in　transmission　towers　in　China.　For　this　study,　a　total　of　105　compression　members　were　tested　statically　to　investigate　the　bearing　capacity　of　cold-formed　steel　members　under　different　boundary　conditions　in　transmission　towers.　The　test　results　were　compared　to　the　results　predicted　by　the　current　design　codes.　For　deeper　insight,　additional　coupled　members　were　simulated　using　finite　element　analysis.　An　improved　design　method　was　developed　based　on　the　experimental　and　analytical　results.