Abstract: Objective To know the prevalence of post-traumatic stress disorder(PTSD) and its comorbidities among the students from Wenchuan earthquake-stricken area one year after the disaster.Methods Totally 191 college students from the earthquake-stricken area were measured with post-traumatic stress disorde self-rating scale(PTSD-SS),Self-rating Depression Scale(SAS) and Self-rating Anxiety Scale(SDS),and psychologic consullation.Results The number of the students with symptoms of PTSD was 79(41.4%).Of all PTSD sufferers,46(58.2%) had anxiety;75(94.9%) had depression;44(55.7%) had both of amxiety and depression.There was a significant differences in anxiety symptoms(P<0.05) between male and female students.There were positive correlations between PTSD and other symptoms(P<0.01).The occurence of PTSD related significantly to the death or injury of the relatives.Conclusion The prevalence of PTSD and its comorbidities are serious among the college students from the earthquake-stricken area.The traumatic events are key causes resulting in stress disorder.