Knee adhesions are generally manifested by the inability of the knee to flex and extend on its own, with significant impairment in flexion and extension. Knee adhesions can be divided into two areas: 1. Intra-articular adhesions: originate from intra-articular fractures, ligament injuries, and meniscal injuries. Failure to exercise in a timely manner after arthroscopic treatment can also lead to joint adhesions. Intra-articular adhesions are firstly rehabilitated, and if conservative treatment is not satisfactory, manual release can be performed under anesthesia. If manual release is still not effective, intra-articular adhesions can be released arthroscopically; 2. Extra-articular adhesions: generally seen in femoral fractures, and untimely exercise after femoral fracture can lead to joint stiffness. In the early stage of adhesions, rehabilitation exercises can be performed by manipulation, and if the treatment is not effective, incision surgery is taken to restore the motor function of the knee joint.