Objectives To assess the impact of childhood trauma on cognitive function in healthy young adults. Methods Three times since February 2012， the Childhood Trauma Questionnaire（ CTQ） was used to screen out healthy young people with childhood trauma and without any form of childhood trauma. These participants were then evaluated using the Wisconsin Card Sorting Test（ WCST）， the Stroop Test， Trail Making Test， Verbal Fluency Test， and the Wechs Memory Scale（ WMS）. Results The performance of young adults with childhood trauma（ n=90） was significantly different in the Verbal Fluency Test， the visual regenerative test of WMS and WCST compared with those with no childhood trauma（ n=104）. The total score of CTQ was negatively correlated with results of Visual Reproduction and Trail Making Test B， while it was positively correlated with results of WCST ervor response； the number of different types of childhood trauma was negatively correlated with the Stroop test， number of WCST correct response and partial results and partial results of WMS（ all P＜0.05）. Conclusions The cognitive function of healthy young people with childhood trauma is impaired. The more severe the trauma in childhood or the higher the number of different traumas， the worse is their cognitive function.