Four bar linkage is an important content in teaching of the Mechanical Principle course,and it is abstract.With graphical modeling method based on AMESim,the model of four bar linkage mechanism simulation model is established for dynamic demonstration,and it can demonstrate vividly the related characteristic and concepts by changing one or more parameters.Thus it can improve the teaching effect obviously.It shows that AMESim can improve effect in teaching of four bar linkage mechanism,compared with traditional teaching method.