Conventional artificial knees are divided into prostheses that preserve and do not preserve the posterior fork ligament. Regardless of the type of prosthesis, postoperatively we must focus on the training of joint function. Here, I would like to share some of my personal experiences with the majority of patients regarding some postoperative discomfort and major issues in functional training. Pain and swelling Generally in the early postoperative period, within 3 weeks, most patients will experience swelling and discomfort around the joint, pain and discomfort when walking on the ground or during functional exercises, and therefore are reluctant to take the initiative to exercise. First of all, there are many reasons for pain after arthroplasty, and the application of postoperative analgesic drugs is quite necessary, so don’t worry too much, some patients take oral drugs up to 3 months. At this stage, you can flex homemade ice after exercise, towel wrapped and apply cold compresses on both sides and behind the knee joint, elevate the limb and strengthen the left ankle movement to facilitate the swelling to subside. In the postoperative period of about 6 weeks postoperative pain basically no medication is needed straightening or flexion exercise poorer knee function exercise is very important, in the first 6 weeks can be called the golden time, such as conditions can be in the rehabilitation department guidance training. For most patients basically go home to exercise on their own, during this time should actively follow the requirements of training during the hospital guidance, in about 1 month outpatient review. Muscle strength training About 3 months after surgery, many patients will have insufficient thigh muscle strength, so they need active thigh muscle strength training after surgery, mainly for knee extension strength. The better the muscle strength recovery, the faster the joint pain relief and the longer the life span of the prosthesis. The rehabilitation manual after joint replacement must be read carefully and trained strictly as required. Perseverance is victory, and I wish you all a speedy recovery.