In the rail transit industry, FRP/carbon fiber composite products are widely used in components such as fairings, seats, and interior panels for subways, light rails, buses, and railway passenger cars due to their aesthetic appeal, lightweight properties, dimensional precision, flame retardancy, and low smoke emission. These properties contribute significantly to vehicle lightweighting and play a crucial role in green environmental protection and the low-carbon economy module. For example, adopting composite solutions for high-speed train bogies can achieve a weight reduction of 25-40%, reduce operational energy consumption by over 15%, decrease wheel-rail wear by more than 30%, lower noise levels by 2-3 dB, and reduce lifecycle costs by over 15%. Resins used in rail transit applications must meet stringent flame-retardant requirements, including test standards for oxygen index, flame spread rate, smoke density, and vertical burning performance.