Abstract: This paper analyzes and expands the demand preference similarity theory, and employs the theory to the analysis of the book copyright trades between the developing and the developed countries. Then the panel data model is used to empirically verify the trade data. According to the results, the demand preference similarity theory is confirmed adaptable to the structure of book copyright trade of China. Furthermore, the panel model amended based on this theory can measure well various influence factors, influence degrees and influence paths for the book copyright trade. Based on the discoveries, this paper provides some suggestions to promote the development of China’ s book copyright trade.