Medical High Polymer Splint is made of a new functional environment-friendly material - the special synthetic macromolecule polyester with a series of physical and chemical treatments. Under the temperature of 65-70 degree centigrade, it will intenerate and can be shaped freely, and of advantages such as light weight, high strength, ventilation, water-fast, entire X-ray permeation, biodegradation, innocuous, odorless and non-excitant to the skin. Therefore, it can serve as an extremely ideal orthopedic external fixation material and can substitute for the traditional plaster cast, bandage and small plywood. So far, it has been widely used for the orthopedic external fixation, rehabilitation and for making orthotic devices.