Abstract:[Objective] To introduce the surgical technique and preliminary clinical results of anterior and posterior percutaneous Infixfixations of pelvic ring injury. [Methods] From January 2021 to October 2023, 6 patients with anterior and posterior pelvic ring injurieswere treated surgically. The Infix of the posterior pelvic ring was performed in the forward position of prone or floating position, and then theInfix of the anterior pelvic ring was performed in the backward position of supine or floating position. Firstly, an incision was made abovethe posterior superior iliac spine on both sides to expose the iliac bone, and part of the iliac bone was chiseled above the posterior superioriliac spine, followed by an opening between the internal and external plates of the iliac crest. The pedicle screws were placed aiming the an-terior inferior iliac spine, and a transverse connecting rod in appropriate length was placed to tighten the tail cap after reduction of fractureor dislocation. After that, the patient was placed in a supine position or a floating position. Incisions were made centered on both side of theanterior inferior iliac spine to reveal the bone. The screws were inserted in the direction to the posterior superior iliac spine, and the tail ofthe screw was about 2 cm from the anterior inferior iliac spine. A precurved connecting rod was placed under the abdominal wall and lockedthe tail cap after reducing the pelvic fracture or dislocation. [Results] All the 6 patients were successfully operated on without serious com-plications, such as major blood vessel and nerve injury, and were followed up for 6~36 months. According to Majeed function score, 4 pa-tients were excellent, 1 was good and 1 was fair, with the excellent and good rate of 83.3%. Chronic sacroiliac joint pain occurred in a pa-tient who was marked as fair in clinical evaluation. Regarding image evaluation, the reduction quality was excellent in 4 cases and good in 2cases, with the excellent and good rate of 100% based on the Matta's criteria. Bone healing achieved in all of the 6 paitients 3 months afteroperation with no loss of reduction or failure of internal fixation, and the implants were removed 3 months after surgery. [Conclusion] Ante-rior and posterior percutaneous Infix fixations are minimally invasive technique with advantages of simple operation, reliable fixation, few complications, and good clinical outcomes in the treatment of pelvic ring injury.