Objective To discuss the clinical applied value of MSCT MPR in displaying the relation between periampullary diverticula(PAD) and pancreaticobiliary duct.Methods There were 32 patients with PAD found through the volume scans by MSCT, and proved by endosope or GI. The axial source images after being reconstructed were transmitted to Vitrea workstation for observation, and the images which were valid to show the relation between PAD and pancreaticobiliary duct were get.Results In 32 patient,34 PADs were found,22PADs located above the papilla , 7 located in the neck edge of diverticula , 4 were papilla in diverticula and 1 located below papilla .Conclusion MPR can clearly display PAD and pancreaticobiliary duct, their relation and pancreaticobiliary disease.