Product review spare affects the reference value of information to a certain extent. The purpose of this paper was to set up a model to remove the product review spam, and retained the real product reviews. Firstly, this paper analyzed the characterictics of the product reviews, and abstracted 14 features from Data collecting, text preprocessing, mutual informa- tion inspecting, and text representing. Secondly, we established a model of combination classifications based on KNN and Bayes algorithm by using the biggest complementarity. Finally, we made cross validating to the product review for ...