The patient was a middle-aged male who felt pain in his left knee 1 month ago due to a sharp stop while running, and the symptoms worsened with knee flexion. Examination: mild swelling of the left knee, flexion and extension activities are possible, left anterior drawer test (+), Lachman test (+). The diagnosis was “left anterior cruciate ligament rupture + medial meniscus injury” in combination with MR. Arthroscopic reconstruction of the anterior cruciate ligament is a routine procedure, which can be performed with autologous or allogeneic tendons, with the advantages of small incision (avoiding the traditional method of incision to expose the joint cavity), low infection rate and fast recovery. The current fixation methods used at the femoral end are endobutton plates, interface compression screws and absorbable transverse nail technique (Rigidfix), the first two of which are routinely performed in our department. In this operation, we used the absorbable transverse nailing technique, which combines the advantages of tabbed plate and interface extrusion screw, not only can ensure the 360 degree contact between the reconstructed ligament and the bone tunnel, which is conducive to protecting the reconstructed ligament and promoting the healing of the bone tendon, but also avoid the “wiper effect” and “cutting effect “It is an advanced fixation method that can ensure a firm fixation and facilitate bone and tendon healing, which has been used successfully for many years abroad and is worth promoting. Preoperative MRI arthroscopic rupture of the anterior cruciate ligament Arthroscopic reconstruction of the anterior cruciate ligament Rigidfix transverse nail fixation pattern Rigidfix transverse nail fixation Intraoperative arthroscopic Rigidfix transverse nail fixation of the allograft tendon Reconstruction of the anterior cruciate ligament Postoperative wound