The invention discloses a naive Bayes classification model improvement method based on attribute weighting, and relates to the field of data processing and classification. The method comprises the following steps of S1, preprocessing the data; S2, calculating a grouping Spearman coefficient, removing the redundant attributes, and updating the data set; S3, solving the prior probability and the class condition probability of each class; S4, calculating a weighting coefficient of each attribute of the updated training set; and S5, performing classification according to the weighted improved model, and performing statistics on a classification result. According to the method, the conditional independence assumption of the naive Bayes classification model is effectively weakened through an attribute weighting mode, the redundant attributes are removed through the Spearman coefficient, and the accuracy and efficiency of the naive Bayes model are obviously improved through the improved model.