Objective To explore the effect of fixed orthodontics treatment on aesthetic effect and masticatory function recovery in patients with irregular dentition. Methods A total of 120 patients with irregular dentition admitted to the Department of Stomatology, Minhang District Pujiang Community Health Service Center from July 2021 to July 2022 were selected, and they were divided into the control group and the observation group by the random number table method, with 60 patients in each group. The control group received all-ceramic crown restoration, and the observation group received fixed orthodontics treatment. The aesthetic effect, masticatory function recovery, satisfaction and recurrence were compared between the two groups. Results The scores of aesthetic effect in the observation group after treatment were higher than those in the control group (P <0.05). The masticatory function recovery of the observation group after treatment was better than that of the control group (P <0.05). The scores of aesthetic improvement satisfaction, functional recovery satisfaction and overall treatment satisfaction in the observation group after treatment were higher than those in the control group, but the score of comfort during treatment was lower than that in the control group (P <0.05). The recurrence rate of the observation group (3.33%) was lower than that of the control group (13.33%) (P <0.05). Conclusion For patients with irregular dentition, fixed orthodontics treatment shows good effects in improving facial aesthetics, reconstructing masticatory function, achieving high satisfaction and long-term stability.