1. Therapist: Two therapists were used to correct gait deviations at the beginning. One therapist is on the affected side to help facilitate the swing of the affected lower extremity; to make sure the heel lands first; to prevent knee hyperextension; and to ensure that the standing time of both legs is symmetrical to the stride length. The other therapist stands behind the patient with both feet on the edge of the activity plate: facilitating weight transfer to the weight-bearing leg; ensuring hip extension, pelvic rotation, and trunk uprightness; and preventing sitting in a sling. As the gait improves, gradually transition to a therapist standing behind the patient or next to the activity plate to give guidance, and finally complete the walking on the activity plate independently. 2, the speed of the activity plate: should be set according to the specific situation of each patient, that is, individualized, so that each patient has the appropriate step frequency and stride length. The literature reports 0.09m/s (0.07-0.11m/s) at the beginning, gradually reaching 0.17m/s (0.12-0.23m/s) until the end of training. 3, the degree of weight loss: as soon as possible to make the lower limbs completely weight-bearing, weight loss is only to create the conditions for the transition to normal weight-bearing. At the beginning, the weight loss is 20%-40% of body weight (average 30% of body weight), up to 70% of body weight, with the improvement of gait pattern, gradually reduce the weight loss (increase the weight of both lower limbs), and finally reach the full weight-bearing walking. 4.Treatment time: according to the principle of gradual and progressive, gradually extended. At the beginning of 15min/time, 3-5 days later to 30min/time, 5 days/week. Generally, after 3 weeks of training, you can achieve independent walking on the activity plate or on the ground.