Ecopath technology is a mature tool for analyzing ecosystem characteristics, which is based on the basic principle of nutritional dynamics and the food web as the main thread. It simplifies natural ecosystems and quantifies various characteristic parameters of ecosystems through modeling. It has been applied to various ecosystems. This article conducts research based on Ecopath technology. Firstly, construct the Ecopath basic model, which consists of three parts: model representation, model process, and sensitivity analysis; Then, an Ecopath functional model was constructed, and based on ecological, biological taxonomy, or dietary composition characteristics, the semi-submersible artificial reef ecosystem model of Yanzi Island was divided into 14 functional groups; Finally, present the research results and data analysis, including overall system characteristic analysis, post proliferation comparative analysis, and sensitivity analysis. The research results provide reference for the construction of semi-submersible artificial fish reefs and the increase of aquaculture species, structural optimization, and sustainable output in marine pastures.