In order to realize the standardized formulation and application of fishery thematic electronic chart, based on the IHO S-57 international electronic chart standard, this paper analyzes the chart data model and data structure, and according to the main contents and characteristics of fishery thematic information, extends the data set identification field in the data set information record, defines the coding rules of marine fishery thematic electronic chart products. In the category of objects and attributes, fishery thematic objects and thematic attributes are added, and some thematic attribute items (values) are added, so as to design the data structure of fishery thematic electronic chart. The research results will facilitate the integration, sharing and application of marine fishery information, promote the development and production of fishery thematic electronic chart products, and provide standardized information service support for the research and utilization of fishery biological resources, fishery production and management, and marine fishery economic development.