Abstract: In order to improve student's psychological quality and to provide basis for the psychological consultation.The Eysenck Personlity Questionnaire and a self-appreciate questionnaire about students and their family was used to investigate single-child college sutdents(102 schoolboys' and 71 schoolgirls')and non-single -child college studets(106 schoo lboys and 82 schoolgirls'),who were born in Tianjin city.Result shows there isn't a remarkable difference between single-child schoolboys' EPQ scores and non-single-child schoolboys';Single-Child schoolgirls' scores in E and L are in the other scores.Personality of single-child schoolgirls',that is to say,single-son schoolgirls' are more navie and infantile.But in the whole,There isn't a marked difference betwwen single-child students' personality and non-single-child students'.