3D printing, also known as additive manufacturing, is the focus of "rapid manufacturing" research in recent years. 3D printing technology has been widely used in various medical fields because of its low cost, fast production time and high efficiency. At present, in the field of orthosis, there are various types of 3D printing orthosis appeared in clinic and achieved good results. This review focuses on the principle, printing materials and parameters, biomechanics and 3D printing standards of several common printing technologies in the production of 3D printing orthosis.