Objective To analyze the effect of fixed orthodontic technique combined with cast porcelain veneer on aesthetics in patients undergoing oral aesthetic restoration. Methods A total of 60 patients who underwent oral aesthetic restoration in our hospital from January 2021 to January 2022 were selected as the research subjects, and they were divided into the control group and the observation group according to different restoration methods, with 30 patients in each group. The control group was treated with fixed orthodontic technique combined with porcelain crown restoration, and the observation group was treated with fixed orthodontic technique combined with cast porcelain veneer restoration. The periodontal indexes, aesthetics, restoration effect and complications were compared between the two groups. Results After restoration, the scores of periodontal pocket depth, attachment loss, plaque index and gingival bleeding index in the two groups were lower than those before restoration, and those in the observation group were lower than those in the control group (P <0.05). After restoration, the scores of morphology, color, marginal aesthetics and translucency in the two groups were higher than those before restoration, and those in the observation group were higher than those in the control group (P <0.05). The total effective rate of restoration in the observation group (96.67%) was higher than that in the control group (80.00%) (P <0.05). The incidence of complications in the observation group (6.67%) was lower than that in the control group (30.00%) (P <0.05). Conclusion In oral aesthetic restoration, fixed orthodontic technology combined with cast porcelain veneer is beneficial to improve aesthetics, and has less adverse effects on periodontal, with better restoration effect and fewer complications, which is worthy of clinical application.