It is difficult to reflect the internal differences of different majors by the statistical caliber of employment rate. The micro-structure of employment distribution is an intuitive reflection of the integration of supply and demand of graduates. Employment data of undergraduates majoring in water supply and drainage science and engineering in Zhongkai University of Agriculture and Engineering from 2011 to 2018 were selected as samples to classify and count the total employment rate, geographical distribution, starting salary range, unit properties, occupation type, industry category and professional correlation, to analyze the changing trend from 2011 to 2018, and to compare with the same indicators in the nationwide and province wide. The results show that the overall employment situation maintain a good momentum in recent years, the employment rate of water supply and drainage science and engineering graduates of Zhongkai University of Agriculture and Engineering exceed 94% each year and over 73% graduates are engaged in professional counterpart work. However, there are also structural weaknesses. In the future talent training reform, it is necessary to rely on the main channel of professional education, optimize the practical teaching system, bring in knowledge components related to agriculture and integrate innovation and entrepreneurship education.