The choice of methods for pediatric radial head subluxation repositioning currently exists between posterior and anterior rotational repositioning. Nowadays, the more classical traction-post-rotation reset maneuver is mostly used in clinical practice, because it follows the principle of resetting by counter-traumatic mechanism. However, more and more basic and clinical studies have proved that anterior rotation is more superior, and Maeias and MeDonald have proved that the success rate of anterior rotation is significantly higher than that of posterior rotation, and our scholars have not only come to the same conclusion, but also researched the mechanism of anterior rotation: due to extreme anterior rotation, the radial tuberosity can be displaced up to 2 mm, and the circumferential head can be displaced up to 2 mm, and the circumferential head can be moved to the other side. Because of the extreme anterior rotation, the radial tuberosity moves outward from the axis by up to 2mm, the annular ligament is the most tense, and at the same time, the radial collateral ligament attached to the lateral side of the annular ligament is also tense, which participates in pulling the annular ligament embedded in the space of the brachioradial joint, and then makes it slide around to the neck of the radius to release the embeddedness, which is the reason why the success rate of the extreme anterior rotation reset is high. An investigation of the pain problems generated during the operation of the anterior and posterior rotary reset methods revealed that the anterior rotary reset method is less painful than the posterior rotary reset method, and is therefore more easily accepted by the patients. Therefore, in the treatment process, doctors follow the principle of “the method is applied in such a way that the patient does not know the pain”, and generally choose the anterior rotation method, which has a higher rate of repositioning and less pain.