This research adjusted the water flooding characteristic curves in the application of the water, oil and liquid production characterization of air⁃foam flooding reservoir. The numerical simulation method is used to analyze and predict the production performance of air foam flooding reservoir in the stable production stage. Four types of water flooding curves are used in the application of both direct air⁃foam flooding reservoir and the air⁃foam flooding reservoir after water flooding. The results suggest that the type⁃D water flooding characteristic curve is better than other curves in the application of the direct air⁃foam flooding reservoir. The type⁃C and type⁃D water flooding characteristic curves are better performed in the application of the air⁃foam flooding reservoir after water flooding. The characteristic curve of gas production is calculated based on the method proposed by H. R Warner, and can be used to predict the gas⁃oil ratio within three years after the gas breakthrough is stable. Therefore, the gas production volume can be calculated.