Abstract:[Objective] To compare the clinical efficacy of direct suture with anchor and tight suture around the patella for the treatment of acute patellar dislocation caused by patellar insertion. [Methods] A retrospective analysis was conducted on the clinical data of 34 patients with acute patellar dislocation caused by patellar insertion of MPFL treated with suture anchor from October 2015 to May 2021.16 cases were fixed by direct suture with suture anchor, while 18 cases were fixed by tightening suture around the patella.Compare the results of perioperative, follow-up, and imaging data between two groups of patients.[Results] The surgery was successfully completed in both groups of patients, and there were no early postoperative complications such as infection or thrombosis.In terms of preventing patellar redislocation, two patients in the direct suture group experienced redislocation, while no patients in the patellar suture group experienced redislocation. In terms of clinical efficacy, at the last follow-up, the VAS score,Lysholm score, Kujala score, IKDC score and ROM of the knee joint in both groups of patients were significantly improved compared to before surgery (P<0.05). In terms of imaging, the lateral patellar angle and patellar displacement in both groups of patients were significantly improved compared to before surgery (P<0.05), and there was no statistically significant difference in the above indicators between the two groups (P>0.05).[Conclusion] Two types of suture anchor repair methods have satisfactory clinical efficacy in the treatment of acute patellar dislocation caused by patellar insertion in MPFL. In comparison, the tightening suture repair method around the patella has more advantages in preventing patellar redislocation.