First stage: (mainly do muscle static contraction exercises and joint exercises other than the affected hip) (3 days) 1, quadriceps training: supine position, a soft pillow under the knee, active downward pressure on the knee joint, keep the thigh muscle contraction state for 10 seconds, relax, repeat 20 times / group, 3 to 4 groups / day. 2. Ankle dorsiflexion and extension exercises; supine position, active maximum flexion and extension of the ankle joint and resistance training, avoid internal and external rotation of the hip during exercise. The hemodynamic effect of ankle movement is significant and is one of the measures to prevent venous thrombosis. Hold each movement for 10 seconds, repeat 20 times/group, 3-4 groups/day. 3, hip contraction exercise: supine leg extension position, upper limbs comfortably placed on the side of the body, contract the hip muscles, and try to do the hip lifting action with both hands to hold for 10 seconds, repeat 20 times / group, 2-3 groups / day. 4, patellar nudge exercise: supine position, push the patella up, down, left, right, rotate, repeat 20 times / group, 2-3 groups / day. Second stage: (active movement of the affected hip) (3 days) 1, supine straight leg elevation exercise: (active as the main, passive as a supplement) elevation within 30o, hold time from 15 seconds gradually increase, 10 times/group, 2-3 groups/day. 2, supine flexion of the hip and knee exercise: the nurse can hold the knee under one hand and the heel of the foot with the other hand, and flex the hip without causing abnormal pain. Flexion of the hip should be less than 90o, and internal rotation is prohibited: 10 times/group, 2-3 groups/day. 3, supine position affected limb abduction exercise: a soft pillow between the legs, with the help of resistance active leg clamping inward and abduction of the hip joint, each action held for 10 seconds, repeat 20 times / group, 2-3 groups / day. 4, position: can change position from prone to semi-recumbent, shake the head of the bed high.