In recent years, Situational teaching method of sale based on constructivism is an important trend in the exploration of teaching methods. Compared to traditional teaching, situational teaching makes students more active and stimulates students' interests and consideration. Through an exploration on situational teaching in the course of "automobile sales and service", situational teaching mode is used to renew the teaching method, and in addition, the construction and the process of scene-drama is induced and concluded. During the attempt of practical teaching, after analyzing the teaching effect, some disadvantages of scene-drama mode are put forward.