Abstract: In this paper, taking Zhejiang Province as an example, we deeply discussed the relationship between marine fisheries and biodiversity. As is known, marine biodiversity is the material basis for the development of marine fishery. However, overfishing, bycatch, catching natural seed, selfpollution, and the farmed species escaping also affect marine biodiversity conversely, which not only reduced marine biodiversity, but also restricted the sustainable development of marine fisheries. Based on the present situation of marine biodiversity and the effect of marine fishery on it, all levels of government have actively taken measures to eliminate threats and achieved some outcomes in improving biodiversity, such as establishment of marine reserve, implementation of multiplication and releasing, execution of summer close season, demonstration activities of management for marine biodiversity conservation, rehabilitation typical habitats and so on. The suggestions and countermeasures for the sustainable development of marine biodiversity were proposed such as strengthening the construction of marine conservation areas, controlling fishing intensity and incesscont pollutants, implementing the seaclosure and seafilling ergineering scientificly, implementing integrated coastal zone management, optimizing the culture mode, establishing public participation mechanism and perfecting laws and regulations of marine.

Key words: Zhejiang province, marine fishery, biodiversity, sustainable development