For adapting to the technology background and improving student’s interest in the course of principles of reinforced concrete design, an auxiliary teaching method using open toolbox software for concrete members was introduced into traditional teaching method. First, advantages and disadvantages of hand calculation and computer calculation were analyzed. Then, how to introduce open toolbox software into teaching process was studied. At last, some suggestions for the teaching method based on our teaching experience were proposed. Teaching practice shows that this method is an effective way to solve the problem of separation between the tradition teaching method and the current technology background.