The enrollment ratio of environmental science and engineering postgraduate entrance examination in Jiangnan University is 6: 1. The enrollment ratio of environmental engineering in the School of Environment and Civil Engineering of Jiangnan University is a very realistic problem that every graduate student is very concerned about. Postgraduate enrollment ratio is the proportional relationship between the number of applicants and the number of students admitted. Many graduate staff and teachers of Postgraduate Entrance Examination Network can deeply understand the importance of the enrollment ratio and enrollment ratio of graduate students majoring in environmental engineering in School of Environment and Civil Engineering of Jiangnan University over the years. The basis for choosing schools and majors is very easy to understand, and there are many methods in the process of collecting information on graduate enrollment ratio. Postgraduate candidates should pay attention to the proportion data of the number of graduate students applying for the exam and the number of students enrolled in the unified recruitment. It is necessary to collect the data of enrollment ratio for at least three to five years, so that the data characteristics of enrollment ratio of environmental engineering specialty in the School of Environment and Civil Engineering of Jiangnan University can show the law.