Abstract: 【Objective/Meaning】Under the background of“One Belt and One Road”,the changes of trade pattern of aquatic products in Fujian and Taiwan were studied,thus to provide ideas and references for strengthening the intra-industry trade of aquatic products in Fujian and Taiwan.【Methods/Procedures】Based on the import and export classification data of aquatic products from 2008 to 2016,a series of key indicators of intra-industry trade of aquatic products in Fujian and Taiwan were calculated,including GL,Bruelhart and Thom & Mc Dowell.Then,taking 2013,when the“One Belt and One Road”initiative was proposed,as the cut-off point,the regression model of the influencing factors of intra-industry trade was built in stages to study the main influencing factors at different stages.【Results/Conclusions】The results showed that the trade pattern of aquatic products in Fujian and Taiwan was more and more inclined to intra-industry trade.Before 2013,the main influencing factor of intra-industry trade of aquatic products in Fujian and Taiwan was foreign trade dependence,while after 2013,the main influencing factors were the differences of industrial structure and economic level.Finally,the corresponding countermeasures were put forward from the structure of fishery industry and the economic and trade cooperation between Fujian and Taiwan.