本文利用水文和海流观测资料，从水团相互作用去研究东海高密水及其环流的演变。获得如下一些结果：东海高密水冬季形成于东海中部陆架混合水中，入春以后水团挤压，高密水显得更为突出，入秋后高密水变性，东海中部陆架混合水重新形成；东海高密水核心区可形成气旋环流，从冬到秋经历了一个弱—强—弱的演变过程。海流观测结果证实这个环流是存在的；在东海高密水南侧存在较明显的密度锋，从冬到秋它也经历了一个弱—强—弱的演变过程；水团分析发现，各种与主体分离的混合水从春到夏可在高密水核心周围组合成一个环，从而进一步印证了这个高密水环流的存在 In this paper, the hydrological and ocean current observations are used to study the evolution of the highly dense water and its circulation in the East China Sea from the water-water interaction. The results are as follows: The East China Sea high-density water formed in the East China Sea in the winter mixed shelves mixed water into the spring after the water mass squeeze, high density water is more prominent, high density water denaturation autumn, the East China Sea Central Shelf mixed water re-formed; The core area can form cyclonic circulation, and experienced a weak-strong-weak evolution from winter to autumn. The results of ocean current observations confirm that the circulation exists. There is a more obvious density front on the south side of the East China Sea, and it also experienced a weak-strong-weak evolution from winter to autumn. Separated mixed water from spring to summer can be combined into a ring around the high density of water core, which further confirms the existence of this high density of water circulation