The aim of the present study is to evaluate the functional and radiological outcomes of paediatric femur diaphyseal fracture treated with locking compression plate. Material & Methods: One hundred patients who had submuscular plating for humeral, femoral, or tibial shaft fractures over the course of 2 years had their clinical, radiological, and functional outcomes assessed. A single surgical team from the Department of Orthopaedics performed all of the procedures. Results: The research group included 70 men and 30 women. Males were more predominant. The youngest patient was six and the oldest was 14. The mean age was 10.60 (2.08). Right side fractures 55 (55%) outnumbered left side fractures 45 (45%). Road traffic accidents caused 57% of injuries, sports falls 17%, and height falls 9%. About 35% of fractures were transverse, 25% were comminuted, 31% were oblique, and 9% were spiral. The average union time in group one was 10.5 weeks in our research. Early problems included 4 individuals with superficial infections. Late complications: 10 individuals had thigh soreness. Both knee stiffness and delayed union affected 6 individuals. Functional results were 92 (92%) excellent, 6 (6%) adequate, and 2 (2%) poor. Conclusion: When properly designed and implemented, submuscular plating for diaphyseal long bone fractures is a viable therapy. It is minimally invasive and permits early mobility with good radiological and functional results and few problems.