Significant progress has been made in the artificial restoration of fish habitats, and artificial fish nests are currently one of the main measures for the proliferation of fishery resources and habitat restoration. This article develops a new type of semi submersible environmentally friendly composite artificial fish nest. The entire device adopts a "top bottom" double-layer structure, suspended in water, with a sturdy and durable structure and good environmental performance. By conducting experiments around two bird islands in Baiyangdian, the synergistic mechanism of artificial fish nests on fish resource restoration was systematically analyzed. The results showed that the artificial fish nest increased fish resources by 73.76% to 120.96%, and had a significant aggregation effect on fish with ecological habits of producing and sinking sticky eggs and laying bivalve eggs. After the artificial fish nest was deployed, it could overall increase the unit fishing effort of fish and provide attachments for fish spawning. The results indicate that the artificial fish nest has shelter, foraging, and reproductive functions. This study provides innovative solutions to solve the problems of single function and insufficient ecological sustainability of traditional artificial fish nests, aiming to provide technical reference for the protection and restoration of large surface fisheries.