Cerebral palsy is characterized by a significant motor developmental deficit in infancy, especially in the standing position, with abnormal standing postures such as pointed feet, inward and outward turning or rotation of the feet, knee flexion or hyperextension, and hip flexion or internal rotation. Usually, interventions for abnormal posture can be performed according to the child’s gross motor development level, but management of standing posture should not be done later than 12 months of age. Orthotics are also very effective in correcting abnormal standing postures of the lower extremities, and orthotics play different roles in clinical practice depending on the type of disorder and the child with cerebral palsy. 1, the maintenance of normal limb position, local stability, such as ankle foot orthosis on the stability of the ankle joint; 2, inhibition of spasticity and prevention of limb contracture deformation (such as horseshoe inversion deformity), as well as the maintenance of postoperative correction position. The spasticity suppression effect of orthoses is one of the important indispensable tools in rehabilitation treatment. Suitable orthoses can reduce the tension in all joints of both lower limbs, including around the pelvis; orthoses can also inhibit the primitive reflexes of the foot, which are prone to persist in children with cerebral palsy and lead to abnormal posture and poor balance in the child. 3. Therapeutic effects, improvement of the immobilized motor paradigm, improvement of function as well as enhancement of compensatory and subsidized lost functions. The purpose of orthotics in pediatric cerebral palsy is to improve functional impairment, thus more orthotics are used for a short period of time and fewer are used for a long period of time as a secondary purpose to improve ability, which is different from the use of orthotics in adults. In addition, more severe children with tardive dyskinesia are less often treated with orthotics because the involuntary movements of the whole body in this type of child are difficult to control with local orthotics. This is because it is difficult to control involuntary movements of the whole body with a local orthosis. The maintenance of weight support, such as hip and waist support and stabilization with a long lower limb orthosis, as well as the control of involuntary movements and involuntary joint movements, are also difficult. Most children with cerebral palsy, especially those with spastic cerebral palsy, have increased muscle tone in both lower extremities, scissor gait when walking, and inward turning of the feet, which limits the walking function of the child. The ankle and foot are the largest weight-bearing parts of the body, and maintaining the stability of the ankle and foot and its biomechanical characteristics is one of the keys to walking. How to wear the right orthosis for the affected person? 1.The doctor should have the knowledge and responsibility of rehabilitation engineering. The doctor should make a proper assessment of the affected child, put forward the requirements, purpose and the effect that can be achieved with the orthopedic devices, and consult the therapist and parents. 2. Ask the rehabilitation engineering related technician (e.g. orthopedic technician) to understand the child’s condition. 3. Secondly, the technician should use suitable materials and skilled production techniques. The technician should then explain the reasons and obtain consent from the parents of the child when making the device. The best prescription is then issued by the physician. The content includes the purpose, type, material and precautions for making orthotics. The orthotic production plan is fully discussed in the treatment team, and then a suitable and effective aid is produced. Notes: 1, fitting should be appropriate to prevent orthotic compression of the body, and should be adjusted and updated with age; 2, the texture of the aids should be light, beautiful in appearance, and simple to make; 3, easy to wear; 4, the material should be strong and not easy to break; 5, the aids used for children’s daily life movements should be different according to the child’s different age and different life abilities; 6, the child should be trained to learn 7.To ensure the therapeutic effect, it must be combined with exercise therapy and surgical treatment.