This article takes cluster random sampling method to extract 1200 college students in grade 2013, grade 2014 and grade 2015 in Chongqing Technology and Business University to conduct SCL-90 scale test and data mining, analyzes psychological behavior difference of the college students in the process of examination from the perspective of feelings, consciousness, behavior, living habit and so on through the study of interpersonal relation sensitivity, compulsion, depression, hostility, anxiety and so on, tries to find its law by mining scale test data and provides the reference for optimizing SCL-90 Scale test parameters, for guarding against the cheating in the examination of college students and for optimizing learning atmosphere construction and ideological and political education work.