[Objective] To introduce the surgical and treatment techniques of fixation of posterior cruciate ligament (PCL) avulsion fractures with self-developed guider-assisted posterior anterior tibial tunnel reconstruction. [Methods] From June 2020 to June 2022, 16 patients with PCL avulsion fractures were treated with self-developed guider-assisted posterior anterior tibial tunnel reconstruction. Under arthroscopic examination and cleaning, the blunt-tipped Kirschner wire was inserted through the anterolateral approach, entered the posterior medial compartment through the interval between the PCL and the medial femoral condyle, and exited through the medial aspect of the gastrocnemius muscle, with the outer sleeve directed towards the lateral edge of the tibial tuberosity. The guider was then used to establish a tibial tunnel from posterior to anterior, with a PDS suture passed through the Kirschner wire and pulled out from the anterior aspect of the tibia. High strength suture was then passed through the PCL substance at the anterior edge and passed out through the tibial tunnel exit with the aid of the PDS suture, and the suture was fixed with a suspensory loop. [Results] All 16 patients underwent the surgery smoothly without vascular or nerve injuries and were followed up for 9.69±2.77 months after surgery. At the last follow-up, the IKDC and Lysholm scores were significantly improved compared to preoperative scores, all fractures healed well, and knee joint stability and range of motion were good. [Conclusion] Self-developed guider-assisted posterior anterior tibial tunnel reconstruction for fixing PCL avulsion fractures has the advantages of accurate tunnel establishment, easy and convenient operation, and significant improvement in surgical safety.