Objective To determine the clinical and radiological outcomes of pediatrics who underwent arthroscopic reduction and modified internal fixation of a tibial eminence avulsion fracture with Kirshner wires (K-wires).Methods This was a retrospective study with prospectively collected data in our hospital. Inclusion criteria consisted of 18 patients who underwent arthroscopic reduction and internal fixation of tibial eminence fracture with folded K-wires between September 2016 and March 2019 at a average of 10.78±2.32 months follow-up. The mean age was 10.13±1.91 year-old while there were 3 type II fractures, 10 type III fractures and 5 type IV fractures according to Meyers and Zaricznyj classification system. X-ray, Lachman test, anterior drawer test (ADT) and Lysholm score were used to evaluate clinical outcomes in follow-up. Results Radiographic evaluation showed optimal reduction after surgery and bone union within three months in all pediatric patients. No complications including nonunion，malunion and pin infection were observed. At the final follow-up the mean Lysholm score was 92.91±6.65 overall. Conclusion Arthroscopic reduction and modified K-wire fixation is an effective treatment for pediatric tibial eminence fractures.