Abstract: Objective: To investigate 16 layer spiral CT diagnosis value in adult non traumatic abdominal wall hernia.Methods: A retrospective analysis of 37 cases data of adult non traumatic abdominal wall hernia confirmed by operation or clinical follow-up with 16 slice spiral CT.Results: Abdominal wall incisional hernia in 13 cases,inguinal indirect hernia in 10 cases,lumbar hernia in 4 cases,spigelian hernia in 3 cases,abdominal wall stoma hernia in 3 cases,white line hernia in 2 cases,umbilical hernia in 2 cases.Hernia sac diameter less than 5cm in 23 cases,6~10cm in 11 cases,greater than 10cm in 3 cases.The hernial contents are the greater omentum,bowel and adjacent organs.Conclusion: It is a better diagnosis method with multi-layer CT and post-processing for non traumatic abdominal wall hernia,which could provide a reliable basis for further treatment.