Abstract: Objective: To investigate the imaging features of primary epiploic appendagitis, and to discuss their diagnostic value. Methods: 3 cases were retrospectively analyzed clinical and imaging data of the different parts of the patients with PEA. Combined with the relevant literatures, their imaging characteristics were discussed. Results: 3 cases of PEA, CT scan revealed than there were 3 cases in colon, 1 case in sigmoid colon, 1 case in ileocecal region, 1 case in ascending colon, The lesions were ovoid fatty mass abutting the colon, High density ring with adjacent fat stranding was present in 3 patients, lesions in the central point, linear density. Anti-inflammatory therapy effect is obvious, to avoid the surgical intervention. Conclusion: primary epiploic appendagitis has classical imaging appearance, CT scan is valuable in the diagnosis and differential diagnosis of primary epiploic appendagitis.