Research on improving the method of mental health intelligence evaluation of college students under decision tree

Abstract Based on the behavior characteristics of college students, the evaluation of mental health status is mainly based on the characteristics of a single dimension, which makes the evaluation results more error. Therefore, a method of College Students' mental health evaluation based on improved decision tree is proposed. Construct and improve the decision tree structure, establish the evaluation index system including learning pressure, employment pressure and communication pressure, and construct the evaluation model of mental health status according to the established system; According to the evaluation factor set, comment set, fuzzy subset of weight and membership degree, the mental health status is evaluated, and the feature dimension of mental state perception data is constructed. According to the implementation steps of fuzzy integration evaluation method, the results of College Students' mental health evaluation are obtained. The experimental results show that the main factors affecting the mental health status of college students are employment pressure and academic pressure. This method can effectively reflect the mental health status of college students, which is consistent with the actual mental health status evaluation results.