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本文报告四川西部藏区两型包虫病(Hydatidosis，HD)人群感染特点与分布趋势。在石渠县与甘孜县的8个调查点，采用以B超与X光检查为主，辅以Dot-ELISA与Em18blot血清学试验的方法 对3999人的检查结果 ，人群平均感染率4.03％。其中细粒棘蚴病(Cystic Echinococcosis，CE)2.13％，泡球蚴病(Alveolar Echinococcosis，AE)1.90％。女性感染率略高于男性，性别分布无明显差异。年龄分布显示中老年是高发人群。CE患者平均年龄38.8岁，AE为45.6岁。在不同经济类型地区，纯牧业乡的病情尤为严重，牧区>城区＞农区的这种趋势极为明显。职业分布显示牧民是高危人群，HtD感染率达7.01％一13.53％。AE患者亦以牧民最多，石渠县与甘孜县牧民AE感染率分别达6.06％、4.46％。此外，人群中文盲及受教育程度低者患者较多，随着文化水平提高人群感染率逐渐降低的趋势明显。“,”The paper reports the characteristics and distribution trend of two types of human hydatidosis (HD) in Tibetan region of western Sichuan. A total of 3999 persons in 8 investigation spots were examined with B ultrasound, X- ray mainly, and Dot- ELISA, Em18 blot serological tests supplementarily. The results showed that the average infection rate was 4.03%, in which 2.13% of cystic echinococcosis (CE) and 1.90% of alveolar echinococeosis (AE) . The infection rate of female was slightly higher than tha of male but there were no significant differences between sexes. The middle and old aged persons revealed higher infection rate. The average age of CE and AE cases were 38.8 and 45.6 years old respectively. In different economic regions, even more severe situation occurred in pure stock raising townships. The trend of infection level from high to low was rauarkable as stock raising area> urban area> rural area.Herdsmen with HD infection rate of 7.01%-13.53% and most AE cases constituted the higher risk population. The infection rates of AE among herdsmen in Shipqu and Ganzi counties reached 6.06% and 4.46% .In addition, investigation on record in formal schooling showed that higher infection rates were found in literate and low educated persons and declined along with the enhancement of education level.