Abstract: dysentery outbreaks in ZheJiang province from 1994 to 1995 were analysed.Of all these outbreaks, 88.0% related to the drinking water, 59.10% related to the small waterworks in rural area,18 outbreaks were caused by contaminated river in which the dysentery patient's cloth and urinal were washed directly.In 68% outbreak spots,the epidemic process showed “double peak” or “multiple peak” model.The result indicated that the above factors were the important causes of rerising dysentery incidence in our province.Some related natural factors such as drought were also discussed.