Not long ago, Mr. Liu, who works in a company in Gaoming, came to our joint surgery department because of a knee injury caused by an accident at work. He started to have knee swelling and limited extension on the second day after the injury, and walked with a limp. Dr. Li Bei, the deputy chief physician, explained patiently with a lot of original pictures, microscopic surgery videos, and knee joint models in various forms, and the patient and the company leaders finally agreed to the surgical plan. On the third day after admission, after routine examination and preoperative preparation, the surgeon successfully performed an arthroscopic ACL reconstruction and meniscal suture, and the patient was successfully discharged on the fourth day after surgery. The anterior cruciate ligament (ACL) is an important structure to maintain the anterior stability of the knee joint, and ACL injury is one of the more common sports injuries (USA statistics: 1/3000 people/year). medial meniscus. This method is also used in the reconstruction of ACL injuries in athletes at home and abroad, and countless athletes have returned to the field after surgery. With the continuous research on sports injuries, the advancement of technology, the development and innovation of surgical instruments, and the change of rehabilitation philosophy, arthroscopic reconstruction has become the mainstream of anterior and posterior cruciate ligament treatment today.