Early bedside rehabilitation was started on postoperative day 1, including: 1. Patellar movement: The patient was placed in a recumbent or seated position with the knee relaxed and in a straight position. The therapist fixes the upper and lower edges of the patella around the index finger and thumb of both hands and pushes the patella proximally and distally for 15 times; fixes the medial and lateral edges of the patella and pushes it medially and laterally for 15 times, 2-3 sets per day. 2, ankle pump exercise: patient in lying or sitting position, knee straight, maximum plantarflexion of the ankle joint to the distal end, hold for 3-5 seconds; then maximum dorsiflexion to the proximal end, the point of this exercise is that the patient feels the tightness of the extensor and flexor muscles of the lower limb. Hold for 3-5 seconds, plantarflexion and dorsiflexion for 1 time. Do 15 times for 1 set, 2-3 sets per hour. The ankle pump exercise makes the lower limb muscles contract, squeezes the deep veins, promotes blood circulation, prevents deep vein thrombosis in the lower limb and reduces swelling in the lower limb. It will be changed to 2-3 groups per day 1 week after surgery depending on the situation. 3. Knee compression exercise: The patient takes a lying or sitting position with the lower limb in a straight position. Put a round pillow under the ankle joint, stretch the heel distally, dorsiflex the foot, and press the knee joint downward to tighten the posterior joint capsule and ligaments. Prevent the posterior joint capsule adhesions and overcome the obstacle of extension. 4.Sliding board training: the patient takes the supine position. Put an upright board on the foot side of the bed. The patient’s torso is perpendicular to the board and the foot is placed on top of the board. The foot slowly slides downward to flex the knee joint. This exercise is used to prevent knee flexion disorders and for unweighted knee flexion training in the early postoperative period. 5, straight leg elevation training: the patient takes a lying position, the lower limb of the operated side is in a straight position, elevate the limb to a certain height, hold it for 5 seconds, then put it down and repeat the above action. Or the lower limb of the healthy side is flexed, and the foot is flat on the bed surface. The lower limb of the operated side is positioned in extension, and the limb is raised to the same height as the knee of the healthy side, and held for 3-5 seconds. Repeat 15 times. In patients after cruciate ligament reconstruction, when doing straight leg raising training, the therapist is required to instruct the patient to do simultaneous contraction of the muscles on the flexor and extensor side of the lower limb to prevent the tibia from moving forward, and then raise the limb, this exercise is also known as joint contraction. 6, elastic band training: the patient to take a lying or sitting position, the foot side of the bed tied to the elastic band, the other end of the elastic band on the back of the foot, foot dorsiflexion as far as possible, hold for 5 seconds, repeat 15-20 times. Then tie the elastic band to the head of the bed, the other end of the band on the bottom of the foot, so that the foot try to plantar flexion, and hold for 5 seconds. Repeat 15-20 times.