The combination evaluation method of traditional principal component analysis and Topsis can lose the initial value of original variables because it meets the extraction of linear combination of the variables and because each principal component needs to be renamed according to its sharing level，and can cause the unclear meaning of the principal component and insufficient index explanation capacity，based on that，the improved principal component analysis is pointed out. The improved principal component analysis is used to extract representative original 9 indicators from 15 evaluation indicators，to objectively determine their weight according to contribution rate normalization，and to construct weighted normalized matrix and combine with Topsis. This method has been used in the evaluation on academic periodicals and the produced conclusion is close to practical situation，which reveals that this combined evaluation method is of certain practical significance.