Objective To explore the effect of orthodontics treatment based on digital technology on diastema closure in patients with diastema. Methods A total of 76 patients with diastema admitted to Nanchang Jiangwei Dental Clinic from January to December 2022 were selected, and they were divided into the control group and the observation group according to the random number table method, with 38 patients in each group. The control group was given traditional fixed orthodontics treatment, and the observation group was given orthodontics treatment based on digital technology. The diastema closure of the lower second molar, periodontal health, aesthetic score and complication rate were compared between the two groups. Results After orthodontics treatment, the axial inclination angle in the observation group was higher than that in the control group, while the root resorption volume, SPD and GI were lower than those in the control group (P <0.05). After orthodontics treatment, the scores of anterior overjet level, dental alignment level and posterior occlusion level in the observation group were higher than those in the control group (P <0.05). The incidence of complications in the observation group (5.26%) was lower than that in the control group (23.68%) (P <0.05). Conclusion For patients with diastema, orthodontics treatment based on digital technology helps to accelerate diastema closure, improve periodontal health, enhance aesthetics, and reduce the risk of complications.