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New fiber materials such as carbon fiber have enabled high-speed trains to abandon traditional steel-frame bodies, resulting in significant weight reduction, lower energy consumption, and a marked increase in speed. What’s more noteworthy is that the carbon fiber material used in the body can also be recycled. Carbon fiber materials have **superior impact resistance** compared to steel; in particular, steering wheels made of carbon fiber offer a 35% increase in mechanical strength and a 20% or more increase in impact resistance compared to conventional materials. The strength of the entire vehicle is theoretically at least 20%~30% higher than that of vehicles made from ordinary materials; with composite materials used, the safety of high-speed trains is self-evident. The use of new carbon fiber materials not only promotes a lower-carbon operation of high-speed trains, but also leads to the green production of materials used in vehicles, driving transformation in the rail transit industry. Both Germany and Japan are planning to industrialize carbon fiber vehicles within the next two to three years. At present, new carbon fiber materials in our country are widely used in high-tech fields such as aerospace; the Shenzhou spacecraft, Chang’e rockets, and the manufacturing of large aircraft all make extensive use of these new fiber materials. All the interior soft furnishings on high-speed trains are made from domestic textiles, all of which meet international environmental and flame-retardant standards. The fibers used in the interior textiles of high-speed trains must possess functional properties such as flame resistance and environmental friendliness, and the relevant physical specifications must meet international standards. The flame-retardant fibers used in high-speed trains are completely different from traditional flame-retardant fibers, and the requirements for such fibers vary significantly depending on whether they are in use or at rest. The high-speed operation of high-speed trains, large aircraft, etc., imposes extraordinary requirements on the various properties of flame-retardant fibers. The performance parameters of flame-retardant fibers when the high-speed train operates at 250 kilometers per hour are far higher than those required for a speed of 200 kilometers per hour.