A novel teaching method is proposed to design the contents of the interdisciplinary courses for the specialized mechanical engineering education. The paper discusses the necessity of assigning the proper interdisciplinary courses on the analysis of currently increasing mixed-talent requirement in our modern society. The characteristics of interdisciplinary research are elucidated in order to obtain the hints for guiding the reform of teaching method to suit for the new status that occur in the interdisciplinary course. The relationships and intersections among the different majors are regards as the most important factor for teaching the interdisciplinary courses well. Refining the associated knowledge from these intersections is the core task for teachers since these contents are very easy to avoid the intense inner anxiety and conflict for the student due to the difference between the own and other majors. For the teacher, the contents of lessons should be designed on the basic of the specialized skill of student’s major and not exceed their knowledge structures on a large degree. Based on this behavior, the detailed knowledge of specialized mechanical engineering is gradually assigned in the classes and terminally the whole specialized industry is learned by the student, which is the desired goal. Finally, the example of electrical machinery is addressed for verifying the effectiveness of the approach of refining the intersections to design the contents and classes. The practical results show that the method proposed in this paper has the high effectiveness on teaching the interdisciplinary specialized mechanical engineering education. In addition, we believe that this schema is also able to be applied for the related interdisciplinary courses.