To　investigate　the　effect　of　corrosion　on　the　compressive　bearing　capacity　of　cold-formed　thin-walled　steel　short　columns,　six　specimens　under　axial　compression　and　six　specimens　under　eccentric　compression　around　strong　axes　were　designed　and　processed.　First,　the　relationship　between　the　mechanical　properties　of　materials　and　the　degree　of　corrosion　was　analyzed　through　tensile　tests.　Then,　the　bearing　capacity　tests　of　specimens　were　carried　out,　and　the　failure　modes　and　ultimate　load-bearing　capacity　were　analyzed.　The　results　show　that　the　yield,　tensile　strength,　modulus　of　elasticity　and　the　elongation　of　corroded　steel　decrease　linearly　with　the　increase　of　corrosion　degree.　The　corrosion　of　steel　does　not　change　the　final　failure　mode　of　the　short　column　specimens,　but　with　the　increase　of　eccentricity,　the　local　buckling　of　the　web　becomes　a　coupling　failure　mode　dominated　by　distortion　buckling.　Under　the　same　corrosion　rate,　the　ultimate　bearing　capacity　of　axially　compressed　specimens　degrades　more　obviously　than　that　of　eccentrically　compressed　specimens.　The　ABAQUS　finite　element　software　was　used　to　simulate　the　specimens.　The　results　show　that　the　ABAQUS　software　can　better　predict　the　bearing　capacity　and　buckling　behavior　of　the　specimens.　Copyright　©2021　Engineering　Mechanics.　All　rights　reserved.