Cerebral Palsy is the most important disease causing physical disability in children. A large number of studies have proved that the wearing of lower limb orthosis plays a very important role in improving the motor function and abnormal posture of children with cerebral palsy. Personalized customized orthopedic appliances have the characteristics of high comfort, strong compliance and good treatment effect, while 3D printing is an environmental protection process to achieve personalized customization. In this paper, the clinical use specifications of 3D printed children""s cerebral palsy lower limb orthoses put forward the definition, classification and applicability of 3D printed children""s cerebral palsy lower limb orthoses, the basic process of design, preparation and application, and the relevant technical specifications and life cycle supervision of clinical quality control.