Characteristics found in CT and MRI of osseous hydatidosis were analyzed. The incidence of osseous hydatidosis in China, and its diagnosis and treatment were discussed. The results showed that most of osseous hydatid disease was polycystic. On CT and MRI scanning, it was shown that there were many little cysts constituting a big lesion. Scolex and cyst wall were not clearly shown. Expansive growth was its main feature. The cystic wall was shown as a linear shadow. Recurrent signs of spinal cord compression called for reoperation. The patients led an acceptable life with the disease. Surgical eradication was the main treatment,but recurrence rate was high after the operation.