Artificial joint surgery has evolved over the past four decades to reach a safe and reliable level. More than 90% of artificial joints are reported to be successful 20 years after surgery. Modern artificial joints have reached a level of wear resistance, durability, and no rejection of the body. Patients who originally walked with a limp move freely after surgery, even forgetting it exists. However, the polyethylene in the artificial joint still has the problem of wear and tear, so the patient should not be excessively active after surgery, when moving, should wear low-heeled soft-soled shoes, appropriate field walks, excursions and indoor work, but should not climb too much, up and down stairs, running, the best use of exercises that do not increase the load on the joint such as swimming, tai chi and gymnastics. On the day of surgery: 1. maintain the special position of the affected limb: supine with pillows between the knees, knees and toes upward to prevent internal rotation of the hip; 2. when the patient’s vital signs are stable, adopt a semi-sitting position as soon as possible; 3. instruct the patient to start active contraction of the quadriceps, triceps and tibialis anterior muscles to accelerate venous return and prevent deep vein thrombosis; 4. give cold packs for 24 hours to reduce pain; 5. 5. Keep the airway open and encourage the patient to breathe deeply and cough to prevent lung infection. The first day after surgery: 1. Remove the plasma drainage tube and urinary catheter in the morning (the flow is less than 50ml, if more than 50ml, it can be extended to the second day); 2. Instruct the patient to get out of bed and walk with a walker. Instruct patients to get out of bed again in the afternoon and teach them to get out of bed, go to bed and take steps correctly. Strengthen the muscle strength exercise of both lower limbs. At the same time, patients should be given psychological support, the more enthusiastic the patient is into it, the faster the recovery; 1) Ankle dorsiflexion: active maximum flexion and extension of the ankle joint and resistance training. (2) Quadriceps training: do static contraction of quadriceps, hold for 5 seconds each time, 20 times/group, 2-3 groups/day; at the same time, the patient can do straight leg raising exercise in bed, not requiring the height of lifting, but a lag time of about 5 seconds; slowly bend the knee and hip to slide the heel of the affected limb toward the hip, keeping the toe upward to prevent (3) Resistance muscle strength training: resistance adductor and resistance abductor isometric muscle strength training can be performed, each movement should be held for 5 seconds and repeated 20 times/group, 2-3 groups/day. Postoperative days 2 to 3: Patients should be more active and strengthen the dorsiflexion, plantar flexion and quadriceps training of the ankle joint; postoperative days 4 to 14: Patients should stop the infusion and focus on muscle strength exercise and increasing joint movement. Teach the patient to walk with a double crutch and arrange a post-discharge rehabilitation program. During this period, supine straight leg raising and hip flexion training should also be performed. In addition to the above training, strengthen hip flexion, abduction and external rotation exercises, and make sure the training method is correct to prevent joint dislocation. Train the patient to walk with a single crutch. Post-operative week 4 to 3 months: The patient should be given functional training for daily life, and taught how to go to the toilet, put on and take off shoes and socks, ride in a car and walk up and down stairs. At the same time, patients should be asked to review regularly to prepare for their return to society.