<p>The safety and durability of reinforced concrete (RC) structures face significant impacts from the combined action of corrosion conditions and fatigue stress. To determine the corrosion-fatigue life of RC structures under combined corrosion environment and fatigue loading, a corrosion-fatigue life assessment model for RC structures under the combined action of carbonation environment, chloride-contaminated environment, and fatigue loading, aiming to analyze their corrosion-fatigue life, was developed. Taking a 6&#xa0;m-span RC crane beam in an industrial plant as an example, the proposed model was illustrated, and its corrosion-fatigue life was evaluated. Effects of crane operating frequency, lifting capacity, carbonation environment grade, chloride-contaminated environment grade, ambient temperature, and relative humidity on corrosion-fatigue life were explored. Results indicate that increased loading frequency and stress range shorten the corrosion-fatigue life of RC structures. The combined action of corrosion and fatigue notably reduces corrosion-fatigue life. Compared with single carbonation or chloride-contaminated environments, the combined carbonation and chloride-contaminated environment has a stronger effect on the corrosion-fatigue performance of RC structures. Additionally, ambient temperature and relative humidity influence the corrosion-fatigue life of RC structures. This study can establish a basic framework for assessing the corrosion-fatigue life of RC structures under combined multi-corrosion environments and fatigue loading.</p>