Steel　Corrosion　affects　severely　on　the　life　and　durability　of　RC　structures.　In　order　to　investigate　the　relationship　between　partial　corrosion　of　RC　beams　and　its　cracking　morphology　and　flexural　capacity,　based　on　experimental　data,　RC　partial　corrosion　beam　models　are　simulated　using　finite　element　software　to　model　the　flexural　cracks　and　capacity　of　corroded　RC　beam　under　different　corrosion　rates.　The　results　of　compared　analysis　with　experiment　are　presented:　with　the　increase　of　the　corrosion　rate,　the　cracking　region　is　almost　consistent,　the　number　of　cracks　reduces　gradually,　crack　spacing　becomes　more　unequal,　bending　stiffness　and　yield　strength　greatly　reduce,　ultimate　flexural　capacity　and　energy　absorption　capacity　deteriorates,　numerical　simulation　results　are　in　good　agreement　with　experiment.　©　2016　Trans　Tech　Publications.