In order to ensure safety, it is recommended to carry out rehabilitation training under the guidance of the rehabilitation surgeon and the surgeon: ①Phase 1 (1 to 3 weeks): In the first week, absolutely no weight-bearing, protection of the surgical site, removal of external fixation, active plantarflexion/ dorsiflexion for 5 times; in the second week, plantarflexion/ dorsiflexion, internal and external rotation and circular motion for 20 times each; in the third week, gradually start to walk slowly with partial weight-bearing under the protection of the cast, Before continuing to increase the active training, 20 repetitions of passive traction plantar flexion and internal/external rotation with a rubber band and non-weight-bearing activities in water were performed 3 times a day, together with massage of the scar. Phase 2 (4-6 weeks): gradual change from partial to full weight-bearing, with the knee in 35 or 40° of flexion, and gradual increase in the intensity of passive ankle flexion; full extension of the knee joint from week 5; internal and external rotation and plantar flexion/dorsal extension exercises with a rubber band 20 times, 3 times a day; walking exercises with full floating in water, and bicycle exercises with minimal resistance, both for 20 min. This was combined with gentle lateral massage of the Achilles tendon and ultrasound therapy (mobile method, frequency 800-1000 KHz, speed 3-6 cm per second). Phase 3 (6 to 2 weeks): Full weight-bearing was allowed and the limb was further extended. The ankle joint was strengthened in all directions with a rubber band, the hammer lifting was practiced within the weight-bearing range, and walking exercises were performed with full floating in water; bicycle or walking machine training was performed. Adjunctive treatment as before. Phase 4 (after 12 weeks): Increase the weight of the foot to normal weight, start jogging, treadmill training and trampoline training; outdoor exercise, etc.