Objective　To explore the effect of 3d digital reconstruction and printing technology on the teaching of complex orthopedics. Methods　A total of 90 interns in the Second Affiliated Hospital of Inner Mongolia Medical University from September 2016 to September 2017 were selected as research subjects. According to the different teaching methods

they were divided into control group (n=45) and experimental group (n=45). The former received traditional teaching; the latter used three-dimensional digital reconstruction and printing technology to print out complex fracture models of patients

digitally reproduced fracture classification

developed scientific surgical plans through fracture models

and simulated surgical fixation methods. Examination was divided into clinical skills and written exam according to exam outline requirements; Self-cognitive ability score included professional interest

fracture understanding

etc. The satisfaction of the medical students in the experimental group was determined using self-made questionnaires. t test was used to compare data between groups. Results　Experimental groups' scores for surgical skills (84.36±0.28) and theoretical knowledge (87.55±0.44) were higher than the control group

and the differences were statistically significant (P<0.05). The professional interest of the experimantal group was higher than that of the control group

and the difference was statistically significant (P<0.05). The students' classroom atmosphere was significantly better compared with the control group

and the difference was statistically significant (P<0.05). Conclusion　Using 3 d digital reconstruction and printing technology to establish modes in complex orthopedics teaching process can effectively improve interns' surgical skills and theoretical knowledge

and promote student satisfaction.