The experience of the ultrasonic diagnosis of intrahepatic secondary changes in 36 cases with liver hydatidosis was reported. The ultrasonograms were classified into five types: I. separated internal capsule, II. disruptive internal capsule; III. mixed echo; IV. thick-wall calcification; and V. consolidation. We studied the ultrasonogram character of the five types, and considered that the occurrence of type I, type II, and type IV resulted from single cyst pattern, while type III and type V resulted from multiple cyst pattern. Analysing the pathological foundation of the ultrasonogram changes can offer clinicians a reliable basis for choosing a treatment method.