Abstract:With the development of arthroscopic knee surgery techniques and instruments, the diagnosis and treatment level of knee joint injuries has improved. However, the undesirable phenomenon of emphasizing surgical operations while neglecting diagnostic capabilities has emerged, resulting in misdiagnosis and mistreatment. This issue of the Orthopedic Journal of China features key content related to the diagnosis and treatment of knee injuries: First, pay attention to clinical basic work to avoid misdiagnosis and missed diagnosis. It is necessary to attach importance to basic work such as medical history collection, and reduce misdiagnosis and missed diagnosis caused by weak basic knowledge and blind confidence. Taking multiple ligament injuries of the knee as an example, this paper analyzes the progress and misunderstandings in diagnosis and treatment, and emphasizes the importance of strengthening the training of young doctors, the mentorship and guidance of experts at all levels, and the meticulous work of clinical doctors close to clinical practice. Combined with the difficulty in diagnosing posterior cruciate ligament injury, this paper introduces the application of MRI at 90° flexion position to change the "?"- shaped PCL sign in conventional examination into a "straight lines", making the diagnosis more intuitive and accurate. Second, pay attention to surgical indications and standardized operations to avoid intraoperative and postoperative complications. Continuously study standardized procedures such as surgical indications for knee injuries. This issue analyzes and summarizes hot and controversial events, such as nerve and blood vessel injury during lateral meniscus suture and how to reduce postoperative recurrence during arthroscopic popliteal cyst surgery. Third, pay attention to innovation and the development of new technologies to avoid surgical misunderstandings. Correctly understand the connotation of innovation. The development of new technologies should comply with multiple principles. Considering serious complications, such as intraoperative injury to the popliteal vessels and nerves during lateral meniscus suture, and posterior cruciate ligament surgery, emphasize the risks of blindly developing new technologies without carefully assessing surgical capabilities, and remind doc-tors to carry out surgeries step by step based on their own conditions. Fourth, focus on clinical basic research to improve the diagnosis and treatment level of knee diseases, with an emphasis on basic research in biomechanics, anatomical pathology, imaging, new materials, and new surgical methods. This issue publishes some surgical approach options for hot and difficult issues, such as revision of re-injured anterior cruciate ligament after repair and reconstruction, and emphasizes strengthening the research on perioperative rehabilitation nursing.