Objective To study the spiral CT enhancement scanning the value of diagnosis and differential diagnosis of diaphragmatic hernia. Methods A review analysis of our hospital received 13 patients with traumatic diaphragmatic hernia were check material from January 2013 to December 2015, spiral CT enhancement scanning imaging features of diaphragmatic hernia, and analyze the diaphragmatic hernia image characteristics, and compare the clinical features. Results In this paper, a total of 13 patients with diaphragmatic hernia by spiral CT enhanced scan, 4 cases left diaphragm rupture, diaphragmatic hernia patients with bowel loops at the left chest, heart shadow and mediastinal shift to the right, 3 cases of stomach and bowel up into the left pleural cavity, left pulmonary contusion, 5 patients insufflate bowel shadow into the left side of chest. Conclusion The conclusion spiral CT can accurately for the region, nature, the degree of chest trauma patients with lesions timely diagnosis, can provide the basis for clinical treatment, is worth to promotion and application.