The cases' teaching is very important for the improvement of the teaching effectiveness of the subject of the " Polymer Physics"

the enhancement of the abilities of the thinking of

analyzing and solving the problem

and the excavation of the innovative and creative abilities of the students. The general principles to choose the cases for the library were introduced

The princilples include the unity of the aim

the typicalness of the content

strictness

accuracy

reality

practicity

comprehensiveness and variety. The management and operation of the library were also presented from the construction of each case and the method to choose the case. The establishment of the cases' library provided a solid ensurance for the effective polymer physics teaching.