According to some related materials such as the Statistical Yearbook of Xi'an, Water Resources Bulletin of Shaanxi Province and Statistical Yearbook of Shaanxi Province Water Conservancy, the basic theory of energy value analysis was used in this paper to calculate the irrigation benefit sharing coefficient and the benefit value of irrigation water of Xi'an from 2000 to 2014 as well as their temporal variations. Meanwhile, the regression analysis was applied to analyze the influence factors of the benefit sharing coefficient. The results showed that, the multi-year average value of annual agricultural irrigation benefit sharing coefficient in Xi'an was 0.34 in the past 15 years and gradually decreased with time. The unilateral irrigation water benefit increased continuously with the time change, the change of total benefit was basically consistent with the benefit of unilateral irrigation water benefit. Irrigation water, precipitation, human input, pesticide and fertilizer application, mechanical power input were the main factors that affected the irrigation benefit sharing coefficient of irrigation water in Xi'an, of which, there was a positive correlation between human input and irrigation benefit sharing coefficient, and there were had negative correlations between the other factors and it.