A survey of seasonal distribution characteristics of nutrients in the East China Sea standard sections was carried out in 2015. Based on the survey data in four seasons from East China Sea standard sections (mean values in May, August, November and February represent values in spring, summer, autumn and winter, respectively), seasonal distribution characteristics and variations in contents of five nutrients at the surface, at the depth of 10 m and at the bottom were comprehensively analyzed. The main impact factors were also discussed in this paper. The results show that the highest inorganic nitrogen, phosphate and silicate contents occurred at the bottom of the content, almost with an increasing trend from surface to the bottom. In the East China Sea in 2015, the distribution of nutrients has obvious seasonal variations, and phosphate content and inorganic nitrogen content are higher in autumn and winter than those in spring and summer. Silicate content is higher in summer and winter than that in autumn and spring. The main source of nutrients in the East China Sea is the Changjiang river diluted water, and the Taiwan Warm Current also carries a portion of nutrients into the East China Sea. The combined effect of the Changjiang river diluted water and Taiwan Warm Current makes the nutrients concentration in East China Sea decrease from west to east.