Objective To investigate the oral health status of freshmen of university students and to guide their oral hygiene behaviors. Methods 6 575 freshmen of Peking University students were investigated in this study according to the criterion issued by World Health Organization（WHO） on the basic methods of oral health investigation and China oral health epidemiology survey protocol. The inspection item included caries, gingivitis, malocclusions and impacted teeth. Results In 6 575 freshmen of university students, the prevalence rate of caries, gingivitis, malocclusions and impacted teeth were 35.47％, 60.87％, 19.70％ and 24.62％, respectively. There were statistical significance between the prevalence rate of caries, gingivitis, malocclusions and impacted teeth of male and female（掊2= 131.94, P＜0.001；掊2=216.85, P＜0.001；掊2=14.54, P＜0.01；掊2=23.56, P＜0.001）. There were statistical significance between the prevalence rate of caries, gingivitis and impacted teeth of postgraduate and undergraduate（掊2=4.62，P＜ 0.05；掊2=129.56，P＜0.001；掊2=178.05, P＜0.001）, while there was no statistical significance between the prevalence rate of malocclusions of postgraduate and undergraduate（掊2=0.61, P＞0.05）. Conclusion The oral health status of freshmen of university students are not ideal． It is necessary to strengthen the propaganda education of prevention and protect to freshmen of university students.
