Abstract: Objective: To evaluate the application value of multi-slice spiral CT (MSCT) in the diagnosis of internal abdominal hernia (IAH) with different combined post-processing techniques. Method: A retrospective analysis of 63 cases of intra-abdominal hernia with abdominal enhanced scanning, confirmed by the operation, of which 22 were intra-abdominal hernia with strangulated intestinal obstruction, 41 were intra-abdominal hernia with non-strangulated intestinal obstruction, and different post-processing techniques were combined. Results: Multiplanar reconstruction (MPR) +maximum intensity projection (MIP) group and Multiplanar reconstruction (MPR) +curved planar reformation (CPR) group. According to the signs of coffee bean sign/pseudotumor sign, bird's mouth sign, mesenteric whirlpool sign/cable sign, concentric circle sign and so on, making a judgment about the localization and qualitative analysis of abdominal internal hernia and the results were analyzed. Conclusion: 3 cases of parduodenal hernia, 1 case of Winslow's foramen hernia, 2 cases of pericecal hernia, and 57 cases of intra-abdominal hernia of intestinal adhesive band. The accuracy rate of MPR+MIP group and MPR+CPR group are 80.95% and 76.19%, respectly. There was no statistical difference between the two groups in the diagnosis of intra-abdominal hernia (P>0.05).The results of whirlpool sign/cable sign and concentric circle sign were higher in MPR+MIP group (58.73%, 26.98%) than that in MPR+CPR group (49.21%, 12.70%). There was significant difference between the two groups (P<0.05). Conclusion: The combined post-processing technique of MPR+MIP can make a diagnosis of IAH better, so it can be widely expanded in the imaging diagnosis of intra-abdominal hernia.