Objective: To explore the relationship between parental rearing behavior and personality disorder. Method: Descriptive study was carried out in one key-university in Beijing. Two thousand two hundred and five freshmen were investigated with Personality Diagnostic Questionnaire-Revised (PDQ-R) and EMBU scale. Fifty-five personality disorder cases were diagnosed by International Personality Disorder Examination (IPDE). Results: The scores of emotional warmth, over-protection, and favoring subject of the maternal were higher than those of the paternal. Parental scores of EMBU factors were highly correlative. The scores of rejection, overprotection, favoring subject in personality disorder cases were significantly higher than those in control group, while the score of emotional warmth was significantly lower. Conclusion: Inappropriate parental rearing behavior is a risk factor of personality disorder.