Reinforcement corrosion induced by chloride ingress is one of the major threats of reinforced concrete (RC) structures exposed to chloride attack. The cracks of concrete cover provide additional paths of chloride ingress and facilitate the reinforcement corrosion. Current information regarding the influence of crack development on corrosion possibility is insufficient due to lack of proper analytical approach. On this account, a rapid numerical approach (RNA) is developed in this study to study the chloride ingress of cracked concrete. It could consider the crack development and chloride biding effect. This approach is validated through comparisons with the FEM analysis. Based on this approach, it becomes feasible to estimate the corrosion possibility of cracked RC structures.