[Objective] To compare the clinical outcomes of suture loop with button plate (BP) versus post washer screw (PWS) outletfixations for posterior cruciate ligament (PCL) tibial avulsion fractures. [Methods] A retrospective study was performed on 43 patients whoreceived arthroscopic suture loop fixation of PCL tibial avulsion fractures in our hospital from September 2020 to March 2023. According tothe results of doctor-patient communication, 21 patients had the suture loop fixed by BP at the anterior outlet of the tibial tunnel, while theother 22 patients were fixed by PWS. The perioperative conditions, follow-up data and imaging data were compared between the twogroups. [Results] The BP group consumed significantly less operative time than the PWS group [(51.0±5.2) min vs (58.4±5.2) min, P＜0.001], however, there were no significant differences in the total incision length, intraoperative blood loss, postoperative walking time andhospital stay between the two groups (P＞0.05). All patients in both groups were followed up for more than 12 months, with an average of(20.2±4.6) months, and there was no significant difference in the time to resume full weight-bearing activities between the two groups (P＞0.05). With the passage of postoperative time, Lysholm score and IKDC score were significantly increased in both groups (P＜0.05), whilethe posterior drawer test grade was significantly declined (P＜0.05). There were no significant differences in Lysholm score, IKDC score andpost-drawer test between the two groups before surgery, 3 months after surgery and the last follow-up (P＞0.05). In terms of imaging, therewere no significant differences in fracture reduction quality and fracture healing time between the two groups (P＞0.05). [Conclusion] In ar-throscopic suture loop fixation of PCL tibial avulsion fractures, both BP and PWS fastenings at the anterior outlet do obtain good clinicalconsequences, but the former consumed operation time considerably less.