Objective To study the value of CT scan combined with dynamic enhanced scan in the diagnosis of alveolar echinococcosis. Methods 61 cases of patients with alveolar echinococcosis confirmed by operation and pathology who were admitted in our hospital between January 2014 and June 2015 were studied. 22 cases underwent CT plain scan, and 39 underwent CT plain scan combined with multi-phase dynamic enhanced scan. With the results of surgical and pathological examination as the golden standard, the accuracy of clinical diagnosis was comparatively analyzed between the two groups. The imaging features of CT scan dynamic enhanced scan were analyzed. Results The diagnostic accuracy rate of CT plain scan combined with multi-phase dynamic enhanced scan (89.74%) significantly higher than that of CT (68.18%) (P<0.05). There was multiple cysticercerci in left and right hepatic lobe (alveolar echinococcus or Echinococcus granulosus). CT scan showed that there were some different sizes of low density cystic space-occupying lesions distributed in hepatic left (right) lobe and intracystic lower density shadow. The internal lesions were inhomogeneous and some were with hyperechoic nodules which can be explored. Multiphase dynamic enhanced scan showed small nodules or annular calcification; CT scan of alveolar echinococcus showed round, oval cystic masses and irregular low density shadow, with homogeneous density and obvious lesion mass effect. It also showed that there was patchy and sandy calcification, liver solid patches were abnormally enhanced, with bile duct invasion, portal vein shift caused by compression. CT scan of alveolar echinococcus complicated with infection showed there were irregular cystic masses in cystic dark region and lower density. Multiphase dynamic enhanced scan showed coagulative liquefying necrosis and cystic lesions and calcified tissue in depth, showing vacuole sign (small cyst). Conclusion The value of CT scan combined with dynamic enhanced scan in the diagnosis of alveolar echinococcosis is relatively higher. It can significantly improve the accuracy of clinical diagnosis and the imaging features are more obvious, which can provide enhanced information for clinical diagnosis and provide important basis for clinical diagnosis and treatment.