Mechanical drawing is a compulsory professional basic course for the students who are majoring in mechanics, which can train and equip students with ability to interpret drawings, graphics, spatial thinking. How to optimize teaching contents, improve teaching methods and teaching quality according to the characteristics of mechanical drawing course such as high demands and short practical time, and the actual situation of the students becomes a topic the teachers explore constantly. I gained some experience and knowledge through many years of teaching. Practice shows that the use of these meth...