The change of nutrient level and nutrient proportion in ocean impacts the marine primary productivity and is related to sustainable development of marine ecosystem and marine fishery. The Kuroshio region in East China Sea has rich fishery resources, so the research on nutrients in this area is of great significance to the sustainable development of China’s marine fishery. This paper has analyzed the monthly change of nutrient content, nutrient proportion and nutrient limitation in Kuroshio East China Sea wi...