According to lots of simulating tests on the model sample, this paper studies the discharge characteristics when the silicone rubber surface has one or more water drops and analyses the flashover process of the clean silicone rubber surface covered with condensing water in a controlled fog chamber. 通过试品模拟试验研究了硅橡胶表面存在单个和多个水珠时的放电特性,分析了洁净硅橡胶表面凝结水珠时的闪络过程。