With the rapid growth of the Internet, more and more information has been expressed as several kinds, where the text is the important one. Therefore text automatic categorization has been focused by home and foreign researchers. Now there are many effective methods that have been applied to this field, such as Naive Bayes, KNN, SVM, Neural Network, and Decision Tree, etc. When the huge texts are processing, because of the abundance documents existing for being trained, the performance of using SVM method is...