In order to establish a life prediction method for hull structures considering corrosion factors, based on the analysis of the existing time-varying corrosion damage models of ship hull structures, a time-varying corrosion model considering the factors of action time and maintenance time of corrosion protection system was established according to the actual situation of ship maintenance support. According to the relevant codes, the lifetime standard of hull structure was selected and a prediction method for calculating the lifetime of hull structures was established. The method established the quantitative relationship between the lifetime of hull structure and the factors such as the action time and repair time of corrosion protection system. This method can be used to predict the life of ship structure under uniform corrosion condition, and in turn can be used to guide the selection of design indexes of corrosion protection system and the determination of maintenance strategy of hull structure.