The present work aims to investigate the characters of the Nomex pile in polyurethane resinof breathable nylon fabrics.The conditions of our experiments,such as the mass of Nomex,thelength of Nomex and the thick of PU film were studied.The results show that these Nomex pileswould increase the anti-abrasion,anti-yellowing and the friction coefficient properties of thebreathable nylon fabrics.But the breathable and waterproof properties of the breathable nylonfabrics cannot improve.