The recent application of 3D printing technology in orthopedic field is summarized. We explore the applied levels in orthopedics health of 3D printing, the first level is that 3D printing makes out models for preoperative simulation, which eliminates the need for intra-operative steps, reduces the time of surgery, meets the requirements of patients, and reduces the labor intensity of doctors. The next one is that 3D printing produces surgical guide based on computer-aided design to achieve the precision of the tailor-made implant operation, which shows how to use the guide to ensure the accuracy of surgical position, direction and angle, and improve the safety and predictability of surgery. The third one is 3D printed implants encounter the clinical policy challenge, but personalized 3D printed implants can better meet the needs of the patient. Compared with foreign technology, there is still a gap in the 3D printing in the orthopedics in China, which reveals the countermeasures need to be focused on by China. Finally, the future of applications of 3D printing in orthopedics is prospected.