The present situation of foreign research Because the export trade of aquatic products occupies a very important position in the foreign trade of most countries in the world, foreign scholars pay more attention to the research of aquatic products export. Michael Porter, a professor at Harvard University in the United States, was the first to systematically and comprehensively study competitiveness. His famous competitive trilogy "Competitive Strategy", "Competitive Advantage" and "National Competitive Advantage" discussed the issue of competitiveness from micro, medium and macro perspectives respectively, and formed an influential theory of national competitive advantage [[Michael Porter. Competitive advantage [M]. Beijing: Huaxia Publishing House, 200 1, 20-25. ]]。 Especially the theory of national competitive advantage with diamond model as its core content. The core content of diamond theory is that the formation of the competitiveness of a specific industry depends on four environmental factors, namely, production factors, demand conditions, performance of related and supporting industries, strategy, structure and competition of enterprises, and auxiliary factors of government and opportunities [[Michael Porter. Competitive advantage [M]. Beijing: Huaxia Publishing House, 200 1, 43-44. ]]。 The diamond model of industrial cluster is a complete system, and six factors composed of four internal environmental factors and two auxiliary factors influence and promote each other, forming a dynamic industrial competitive environment [[Wu]]. Study on the development of marine fishery in Ningbo [D]. Master thesis of Ningbo University, 20 13, p 1 1. ]]。 Therefore, the continuous promotion of these factors will continuously increase the competitive advantage of export enterprises in industrial clusters. Akio Guangqing and Shounan Iwaki (Japan, 1986) made a very detailed theoretical analysis and explanation of aquatic products, analyzed the price elasticity, formation mechanism and influencing factors of aquatic products from the perspective of market demand and supply, and discussed the export of aquatic products in detail according to the theory of international trade. Sproul & Ampqueirolo (1994) made a deep study on the change of the trade status of aquatic products between Japan and the United States, and drew the conclusion that with the increase of domestic demand for aquatic products, the dependence on the import of aquatic products will increase, which will lead to an increase in the price of aquatic products in Japan, thus making Japan a big importer of aquatic products and the United States a big exporter of aquatic products. Kuhl (1999) studied the development trend of Scottish aquatic products export, and thought that increasing the export of aquatic products to the European market would bring development to the local aquatic products market, and also suggested that the government, relevant departments and exporters should pay attention to exploring the European market. Leo (2006) thinks that the export of aquatic products is an important source of economic growth in Southeast Asian countries, and the export trade of aquatic products plays a very prominent role in stimulating the fishery economy in most Southeast Asian countries. Leetal(20 13) thinks that by innovating the export trade model of aquatic products in Taiwan Province Province, the export competitiveness of aquatic products in Taiwan Province Province will be continuously improved, thus promoting the faster development of fishery production and aquatic products export processing industry in Taiwan Province Province.