TPU multi-group casting composite material is a kind of material which can realize 3-5 layers of different materials by multi-step casting and online combination. It has beautiful surface and can make different patterns. It has superior strength, wear resistance, safety and environmental protection performance. It is used in inflatable life jacket, diving BC jacket, life raft, hovercraft, inflatable tent, inflatable water bag, military inflatable self expansion mattress, massage air bag, medical protection, industrial conveyor belt and professional waterproof backpack.