This paper firstly expounds the characteristics and causes of various kinds of mildew in glass wine bottles，and then designs experiments to carefully collect glass bottles with different mildew characteristics and their photos.Through experiments ，the characteristics of different kinds of mildew in glass wine bottles at different stages in the actual production process of glass wine bottle factories are shown in detail.It then further summarize and put forward the types of mildew in glass wine bottles.This provide an objective basis for distinguishing different types of mildew in different stages of glass wine bottles and subsequent targeted preventive measures.