在垸内水网型疫区对１０１８名当地居民进行ＫａｔｏＫａｔｚ法、孵化法检查、间接血凝试验（ＩＨＡ）、Ｂ超检查和病史询问，并调查当地的螺情，以了解血吸虫病疫情，结果显示：阳性螺密度达００９９只／０１１ｍ２，居民粪检阳性率４４７６％，ＩＨＡ阳性率６２５２％。Ｂ超检查显示该地人群血吸虫病引起的肝脾慢性损伤也相当严重。提示：垸内水网型疫区具有特有的流行环境，该地区的疫情控制应引起足够重视。研究还显示：该疫区的日本血吸虫病无明显的家庭聚集性。ＫａｔｏＫａｔｚ法与尼龙绢集卵孵化法合用能大大提高检出率，间接血凝实验只有作辅助诊断方法。Ｂ超诊断血吸虫病引起的肝脾异常的标准有待改善。 1018 local residents were subjected to the KatoKatz method, the hatching method, the indirect hemagglutination test (IHA), the B-mode ultrasound examination and the medical history inquiry in the quarantine area of ​​water network in the embankment, and the local snails were investigated to find out the epidemic situation of schistosomiasis The results showed that the positive snail density was 0099 / 011m2, the positive rate of fecal examination was 4476%, and the positive rate of IHA was 6252%. B-ultrasound showed that the population caused by chronic schistosomiasis chronic liver and spleen injury is also very serious. Hint: The water network in the embankment has a unique epidemic environment, the epidemic control in the area should be given enough attention. The study also shows that there is no obvious familial aggregation of schistosomiasis japonica in this endemic area. Kato  Katz method and nylon silk hatching method can greatly increase the detection rate of hatching, indirect hemagglutination test only for diagnostic methods. B-ultrasound diagnosis of schistosomiasis caused by abnormal liver and spleen standards need to be improved.