Disclosed is a ligament fixator for knee joint surgery for fixing the collateral ligament of the knee joint or preventing the injury of the patellar tendon at the tibial tubercle. The ligament fixator comprises a fixation plate (1) and fixation nails (2). Multiple fixation nails (2) are provided and respectively located at edge positions on the same lateral face of the fixation plate (1). When used for fixing the collateral ligament of the knee joint, the fixation nails (2) are nailed and fixed in the femoral condyle, so that the collateral ligament is tightly pressed between the fixation plate (1) and the femoral condyle, the fixation plate (1) comes into full contact with attachment points of the collateral ligament so as to have a large pressing area and a uniform pressing force to provide excellent pressing effects, thus ensuring the surgical effect and the recovery effect of patients. When used for preventing the injury of the patellar tendon at the tibial tubercle, the fixation nails (2) are nailed in and fixed in the tibia, so that the fixation plate (1) is located on an outer side of the patellar tendon, and the patellar tendon at the tibial tubercle is shielded by the fixation plate (1), so as to prevent surgical instruments from coming into contact with the patellar tendon at the tibial tubercle during an operation and also reinforce the fixation of insertion of the patellar tendon to avoid avulsion, thereby effectively protecting the patellar tendon at the tibial tubercle.L'invention concerne un fixateur de ligament pour une chirurgie de l'articulation du genou pour la fixation du ligament collatéral de l'articulation du genou ou la prévention de la lésion du tendon rotulien au niveau de la tubérosité tibiale. Le fixateur de ligament comprend une plaque de fixation (1) et des clous de fixation (2). De multiples clous de fixation (2) sont disposés et situés respectivement à des positions de bord sur la même face latérale de la plaque de fixation (1). Lorsq
