As to the geographical distribution of the 70 cases of liver alveolar echinococcosis in the present series, the highest incidence was found in Gansu province (82.8%), where most of the patients came from Zhang county (65.6%). Female outnumbered slightly male. Most patients were young and in robust years of their life (98.8%). The most frequent symptom was liver mass (56.4%) and the next abdominal pain (28.2%). Imaging examination and immunological test were helpful to the diagnosis. Under microscopic observation the hyperplastic bud from germinal membrane of liver alveococcus cyst wall comprised a few nuclei and showed exogenous or endogenous budding. According to whether alveococcus proliferation was present or not, pathological types of regressive grade I and hyperplastic grade II were discerned. Resection was not done in 34 cases during exploratory laparotomy, but drainage was performed in 8 cases for alveococcus necrotic pseudocyst and cholecstostomy was done in one case for jaundice. Albendazole or/and traditional Chinese medicine were administered in 35 cases. The prognosis of the patients in relevant to some factors such as sex, age, pathology, symptom and treatment was discussed.