Abstract: A hybrid probabilistic classification method was proposed based on the class.The method selects the main features that can represent the essential characteristics of a class text independently for every class text.That is different class text will be expressed by different main features.Based on the main features of each class text,the probability distribution model will be established respectively for every class text.Then the unknown class label text can be classified by naive Bayesian method.The experiment results show that the proposed method is simple,effective and easy to implement.