Considering　the　structural　characteristics　of　transmission　towers,　four　sections　of　cold-formed　angles　with　different　slenderness　ratios　and　constrained　types　were　selected　for　the　experimental　and　numerical　study.　Experiments　and　finite　element　analysis　for　the　ultimate　loads　of　the　compression　cold-formed　angles　were　carried　out.　The　finite　element　model　well　predicts　the　buckling　behaviour　of　the　cold-formed　members.　For　the　axial　compression　members,　the　load-strain　curves　as　well　as　the　ultimate　loads　were　analyzed,　and　the　experimental　ultimate　loads　were　compared　with　those　of　calculated　by　the　applicable　standards.　It　shows　that　the　applicable　standards　aren＇t　adaptive　to　the　strength　design　of　the　compression　cold-formed　members　in　transmission　towers.　Through　the　analysis　of　the　experimental　and　FEA　results,　the　fitting　curve　of　the　stability　coefficients　for　the　cold-formed　members　in　transmission　towers　was　determined.　The　ultimate　loads　calculated　by　the　fitting　curve　are　well　agreed　with　the　experimental　values,　especially　for　the　members　with　relatively　low　slenderness　ratios.　Some　modification　suggestions　were　proposed　for　the　calculation　of　the　ultimate　load　for　the　axial　compression　cold-formed　angle.　Experimental　analysis　on　the　cold-formed　members　of　the　other　five　constrained　types　was　completed,　and　the　modification　formulas　of　the　slenderness　ratios　for　members　of　different　constrained　types　were　obtained.