Objective To compare the application effects of composite resin high-strength ffber veneers and cast porcelain veneers in the restoration of small anterior tooth defect. Methods A total of 71 patients with small anterior tooth defect admitted to Jing'an District Dental Disease Prevention and Treatment Institute from October 2022 to September 2024 were selected, and they were divided into the control group (35 patients) and the experimental group (36 patients) by the random number table method. The control group was restored with cast porcelain veneers, and the experimental group was restored with composite resin high-strength ffber veneers. The restoration effect, aesthetic effect and restoration satisfaction were compared between the two groups. Results The proportion s of grade A in restoration wear, marginal adaptation, marginal staining and secondary caries in the experimental group were higher than those in the control group, and the proportions of grade B were lower than those in the control group, but the differences were not statistically signiffcant (P>0.05). The proportions of grade A in restoration fracture and restoration shedding in the experimental group were higher than those in the control group, and the proportions of grade B were lower than those in the control group (P<0.05). There were no statistically signiffcant differences in crown color and contour scores between the two groups (P>0.05). The crown shape, surface texture, personalized characteristics and total WES score of the experimental group were higher than those of the control group (P<0.05). The restoration satisfaction rate of the experimental group (97.22%) was higher than that of the control group (82.86%) (P<0.05). Conclusion The application effect of composite resin high-strength ffber veneers in the restoration of small anterior tooth defect is superior to that of cast porcelain veneers, with better aesthetic effect after restoration and higher patient satisfaction with the restoration effect.