For the rehabilitation of the posterior cruciate ligament of the knee after reconstruction surgery, the following points need to be done: First, just after surgery, the contraction of the quadriceps muscle needs to be trained, and leg extension and foot hook exercises should also be carried out, and leg lifting exercises can also be carried out in bed. You can also ask your family to help local active muscle massage, the purpose is to prevent the patient’s local muscle atrophy, and can also effectively prevent blood clots; two, wait for a month or so until the ligaments of the joint reconstruction is relatively stable, you can carry out knee flexion and extension activities to restore the patient’s normal joint mobility, you can let the patient sit on the edge of the bed, the lower limbs naturally down, one hand press the femur, the other hand The patient can sit on the edge of the bed with the lower limb hanging down naturally, and press the femur with one hand and the ankle with the other hand for downward pressure to perform knee flexion exercises.