Through cluster analysis, the mental health of vocational college students is divided, so as to improve the scientific and targeted work.1300 vocational college students were investigated with scl-90 symptom scale and cluster analysis was carried out. According to the mental health level, the group of higher vocational college students can be divided into four categories: the first class has excellent mental health level, the second class has high mental health level, the third class has certain psychological confusion, and the fourth class has poor mental health level.Cluster analysis method can find out different student groups and their characteristics in the huge data, which is helpful to find and solve problems in time.