The invention discloses a treatment method for improving the supporting strength for an automobile storage battery, and belongs to the technical field of automobile machining. Specifically, special modified treatment is carried out on a supporting frame for supporting the automobile storage battery; and the treatment method comprises the steps of (1) cleaning the supporting frame, (2) drying the supporting frame, (3) carrying out variable temperature treatment, and (4) carrying out surface treatment. According to the treatment method for improving the supporting strength for the automobile storage battery, the characteristics of the final treated supporting frame are improved, the strength, the wear resistance, the corrosion resistance and the like are well improved, and therefore the supporting strength and the installation stability for the storage battery are effectively guaranteed, and a good significance is achieved on the improvement of the overall performance of an automobile.