Objective To explore the clinical effect of elastic intramedullary nail rocker combined with "rolling pin" technology in the treatment of children''s distal radius metaphyseal junction fracture with closed reduction and internal fixation. Methods Retrospective analysis was made on the clinical data of 28 children with distal radius metaphyseal junction fracture treated by closed reduction and internal fixation assisted by elastic intramedullary nail rocker and "rolling pin" technology from January 2021 to December 2021 in our hospital. There were 25 males and 3 females; The average age is 10.3 years, ranging from 6 to 14 years old. The elastic intramedullary nail rocker combined with "rolling pin" technology was used to assist fracture reduction in all children during the operation, and the operation time and times of intraoperative fluoroscopy were recorded. The time of fracture healing and complications (infection, needle tail irritation, etc.) were recorded. The wrist function of the last follow-up was evaluated by the modified Mayo scoring system (MMWS) and imaging examination. Results All patients were followed up for 6 to 18 months, with an average of 8.4 months and an average operation time of 30.1 minutes; The average intraoperative fluoroscopy was 6.8 times. The average healing time was 4.4 weeks. During the follow-up, one child suffered from needle tail irritation, and improved after removing the Kirschner wire. The results of X-ray examination after operation were all anatomically reset. At the last follow-up, the wrist joint MMWS score was 80-100, with an average of 92.6 points. Among them, 20 cases were excellent and 8 cases were good. Conclusion Elastic intramedullary nail rocker combined with "rolling pin" technology to assist closed reduction and internal fixation in the treatment of children''s distal radius metaphyseal junction fracture has a minimally invasive therapeutic effect. The method is simple and safe, easy to learn and promote.