Objective To explore the effect of transparent preformed crown on masticatory and phonetic functions in children undergoing anterior deciduous teeth trauma restoration. Methods A total of 90 children undergoing anterior deciduous teeth trauma restoration admitted to Nanchong Hospital of Beijing Anzhen Hospital Affiliated to Capital Medical University, Nanchong Central Hospital from April 2022 to May 2024 were selected, and they were divided into the control group and the observation group by the random number table method, with 45 children in each group. The control group was treated with direct composite resin restoration, and the observation group was treated with transparent preformed crown restoration. The masticatory and phonetic functions, adverse reaction rate, children's compliance and quality of life were compared between the two groups. Results After treatment, the scores of masticatory and phonetic functions in the observation group were better than those in the control group (P <0.05). The restoration loss rate (6.67%) and secondary caries rate (4.44%) of the observation group were lower than those of the control group (31.11% and 26.67%, respectively) (P <0.05). The compliance rate of children in the observation group was 91.11%, which was higher than 73.33% in the control group (P <0.05). The quality of life scores of the observation group after treatment were better than those of the control group (P <0.05). Conclusion The application of transparent preformed crown restoration in children with anterior deciduous teeth trauma can effectively improve masticatory and phonetic functions, reduce the incidence of adverse reactions, and enhance children's compliance and quality of life due to the stable performance of the restoration.