Objective To study HIVAIDS related behaviors among students in medical college and to explore the relationships with attachment styles. Methods With stratified-cluster random sampling, 1 227 students were surveyed by using a self-administered questionnaire. Results Loving experience was positively correlated to secure attachment but negatively correlated to fearful attachment. Condom use and exposure of infectious status was positively correlated to secure attachment but negatively correlated to preoccupied attachment and fearful attachment. In addition, some influencing factors of high-risk behaviors also correlated to attachment styles. Conclusion Attachment styles are closely related to HIVAIDS related behaviors.