The bearing capacity of steel - reinforced concrete composite column depends on the geometrical dimensions, structural composition and mechanical properties of the material. In fact, these factors are random, especially when considering the atmospheric corrosion of metals. This paper presents the reliability assessment of strength resistance of circular steel - reinforced concrete composite column considering metal atmospheric corrosion. An uncertainty model is constructed based on the combination of deterministic design model according to Eurocode-4 with the input parameters and the corrosion model being random. The reliability of the column was assessed using Monte Carlo simulation method. The calculation program is built on Matlab platform allows the authors to conduct numerical surveys and draws conclusions and recommendations from the calculations results.