Joint deformities of children with cerebral palsy mainly include the following aspects: skeletal and joint development deformities: including upper limb deformities and lower limb deformities. The most common upper limb deformities are: 1. Shoulder adduction and pronation; 2. Elbow flexion and forearm pronation; 3. Wrist flexion and thumb flexion may be accompanied by adduction and finger flexion; The common deformities of lower limbs are: 1. Pelvic inclination; 2. Acetabular dysplasia; 3. Dislocation or subluxation of hip joint; 4. Hip adduction, hip flexion and internal rotation, etc. 5. Knee flexion, genu varum and genu valgus; 6. Dislocation or subluxation of patella; 7. Foot drop, valgus, varus, horseshoe foot deformity; 8. Claw toe deformity, scoliosis and abnormal shape of vertebral body;