Objective To explore the application of 3D printing model in the teaching of pelvic fracture in traumatic orthopedics. Methods From February 2021 to January 2022, 100 standardized trainees in the Department of Orthopaedics, PLA General Hospital were selected as the research objects. They were divided into teaching group and conventional group by ra ndom number t able method, 50 in each group. The teaching group combines 3D printing m odels for teac hing, while the conventional group adopts traditional teaching mode. The examination results and questions of the two groups were compared. Results The number of questions in the teaching group was more than that in the conventional group, and the difference was statistically significant (P <0.05). The professional theoretical knowledge score of the teaching group was higher than that of the conventional group, and the difference was statistically significant (P <0.05). Conclusion The 3D printing model can display the spatial form of patients' fractures, facilitate the interaction of doctors in ward rounds and teaching, promote the learning and development of young doctors, and have a profound and effective impact in the medical field.