Fiber-reinforced epoxy resin is more and more widely used in power equipment, especially in GIS (gas-insulated switchgear) insulating tie rods, which leads to dry spot defects during resin flow, which affects the performance and reliability of composite materials. Existing studies have shown that resin flow behavior can be significantly improved and dry spot defects can be reduced by optimizing process parameters, which can promote more basic and applied research on resin flow behavior. By optimizing the resin flow path and curing conditions, product defects such as dry spots, bubbles, delamination and other problems caused by poor resin filling can be effectively avoided, thereby improving the overall quality and performance of the product. At the same time, an in-depth understanding of resin flow behavior can help companies better select the right material combination and process parameters, shorten the production cycle, reduce scrap generation, and ultimately achieve the goal of reducing costs.