The invention discloses a fixing steel plate for the posterior cruciate ligament tibial avulsion fracture. The fixing steel plate is provided with a U-shaped pressing plate, the periphery of the front portion of the posterior cruciate ligament tibial insertion is covered with the bending part of the U-shaped pressing plate, and the two sides of the U-shaped pressing plate extend along the edges of the two sides of the posterior cruciate ligament tibial insertion respectively to the rear poration of the posterior cruciate ligament tibial insertion; the lower surface of the U-shaped pressing plate is a curved surface matched with the surface of the bone covered with the U-shaped pressing plate; the two sides of the U-shaped pressing plate are each provided with a lug extending outwards, and the lower surface of each lug is a curved surface matched with the surface of the bone covered with the lug; a screw hole is formed in the middle of each lug, and the axis of each screw hole points to the cortical bone in front of the upper section of the tibia; one line tying hole is formed in the position, close to the front edge of each lug, on the corresponding side of the U-shaped pressing plate, and one line tying hole is formed in the position, close to the rear edge of each lug, on the corresponding side of the U-shaped pressing plate.