Aramid 1414 is the most ideal cord fiber because of its small specific gravity, high strength, good heat resistance and good adhesion to rubber. The aramid cord can make the tire thinner, lighter, easier to dissipate heat, reduce deformation, reduce rolling resistance, improve high-speed running performance, prolong the service life of the tire, and greatly improve the puncture resistance. Its strong and tough characteristics enable the tire to drive to the repair shop without damaging the side of the tire after air leakage. Aramid 1414 is particularly suitable for use as reinforced tire cord for automobiles and aircraft with high speed driving or heavy load, and has a great development prospect.