Objective To explore the clinical effect of arthroscopic internal fixation with threaded anchors in the treatment of posterior cruciate ligament fractures.Methods A total of 80 patients with posterior cruciate ligament anchorage fractures admitted to Yingtan Medical District,No.908 Hospital of Joint Logistic Support Force of Chinese People′s Liberation Army from June 2019 to June 2020 were selected.According to the random number table method,they were divided into control group and experimental group,40 cases in each group.Patients in the control group underwent conventional rouge socket wire fixation,and patients in the experimental group received arthroscopic internal fixation with wire anchors.Patients in both groups were followed up for 6 months.Operation-related indexes and postoperative clinical efficacy were compared between the two groups.The functional recovery before and 6 months after surgery of the two groups was compared.Results The operation time and the healing time of the Ⅰincision in the experimental group were shorter than those in the control group,and the intraoperative blood loss was less than that in the control group,with statistical significances(P<0.05).Before surgery,there was no significant difference in Lysholm score between the two groups(P>0.05).At 6 months after surgery,Lysholm scores in the two groups were higher than those before surgery,the differences were statistically significant(P<0.05).At 6 months after surgery,Lysholm score in the experimental group was higher than that in the control group,and the total effective rate in the experimental group(92.50%)was higher than that in the control group(72.50%),with statistical significances(P<0.05).Conclusion Arthroscopic internal fixation with threaded anchors can significantly reduce the clinical symptoms of patients with posterior cruciate ligament attachment fractures,promote joint function recovery,and have a significant effect.