By well logging smoothing processing and depth correction, the production log data is pretreated. Pretreatment of the production log data is realized by use of the visualized program developed by visual c++ and c compatible. It offers convenience for latter interpretation making pretreatment of the multiphase flow log data software. The interpretation experiment of practical log information shows that precision and dependability of interpretation are greatly improved when the method is applied to interpretation of liquid producing profile log information.