In the secondary education, electromechanics school is not only related to the talent training but also affect students' relevant skills learning. The goal of secondary school in the training mechanical is “student-centered and abilitiy-standarded” also regarding students' practical abilities which is very important. However, the best mechanical professional course is that let students simulate the real situation in learning, reduce the gap between theory and practice and maximize the cultivation of students' skills. In situational teaching, how to simulate realistic situation is created favorable.