Abstract: The experimental principle of mechanical teaching is that students will be theoretical knowledge into an important way of perceptual knowledge. This paper analyzes the present situation ofordinary university mechanical principle experiment teaching and the existing problems,puts forward a new reform. Practice shows that,the unified understanding the importance of experiment teaching,improve experiment equipment update,enrich the basic experiment,comprehensive experiment design,experiment,the establishment of evaluation system is an effective method to improve the teaching quality of mechanical principle.