Introduction and importance:Most of the fractures had been previously treated with open reduction and internal fixation. Although there are a number of fixation methods, a consensus on the treatment options has not been reached yet.Case presentation:We demonstrated the reinforced technique of tension band wiring and its surgical outcomes in the tibial tuberosity fracture of a 14-year-old male basketball player. For the modified technique, the wire was inserted between the patellar tendon and tibial tuberosity (insertion site of patellar tendon) and passed distally through the 2-mm-sized predrill cortical hole. Tightening the figure of the eight loops draws the fractured fragments together and anatomically reduces under appropriate compression. This technique can achieve the reduction and fixation of the fracture simultaneously. We confirmed the fixation stability with a range of knee joint motions. The patient was able to return back to the pre-injury level of sports activity at postoperative 2 months.Clinical discussion:The original technique of tension band wiring utilized the Kirschner wire to make a figure-of-eight loop. However, we used the patellar tendon and its insertion site of the tibial tuberosity for making a figure-of-eight loop. Moreover, the reduction and fixation of fracture were achieved simultaneously by tightening the tension band wire. This reinforced technique was firm enough for postoperative rehabilitation.Conclusion:The most certain advantage of this technique was to be able to reduce anatomically and fixate firmly with appropriate compression simultaneously. We recommend open reduction internal fixation with the reinforced technique of tension band wiring for displaced tibial tuberosity fracture in adolescent athletes.