Objective: To examine the characteristics of childhood traumatic experiences in borderline personality disorder (BPD) in college students. Methods: The Personality Diagnosis Questionnaire-~(4+) (PDQ-~(4+)), Personality Disorder Interview- Ⅳ (PDI - Ⅳ) and Childhood Trauma Questionnaire -28 Short Form (CTQ-SF) were administered to 3227 college students of sophomore and junior. Results: (1) In the investigation of PDQ-~(4+), 31 subjects with childhood traumatic experiences (0.96%) were diagnosed as BPD, and the total score of BDL sub-scale was (2. 62 ± 1.70), including 18 females and 13 males. In CTQ test, the scores of bad environment in females were significantly higher than that in males [(13.63±4.54) vs. (9.83±1.95), P<0.01] . (2) Subjects with BPD got higher scores than normal controls in CTQ-SF, such as the emotional abuse [(2.11 ±0.77) vs. (1.66±0.49), P<0.01] .Conclusion: college students with borderline personality disorder mostly have d different childhood traumatic experiences, and there exists a sex difference.