Objective To investigate the effect of minimally invasive porcelain veneers on periodontal health and aesthetic effect in patients with anterior tooth diastema. Methods A total of 70 patients with anterior tooth diastema treated in the Department of Prosthodontics, Jinan Stomatological Hospital from February 2024 to December 2025 were selected. According to the random number table method, they were divided into the control group and the experimental group, with 35 patients in each group. The control group received all-ceramic veneer restoration, and the experimental group received minimally invasive porcelain veneer restoration. The restoration effect, periodontal health, aesthetic effect and complication rate were compared between the two groups. Results The excellent and good rate of restoration in the experimental group (97.14%) was higher than that in the control group (80.00%) (P<0.05). There were no signiffcant differences in PD, SBI, PI and GI between the two groups (P>0.05). The scores of aesthetic effect in the experimental group were higher than those in the control group (P<0.05). The incidence of complications in the experimental group (2.86%) was lower than that in the control group (20.00%) (P<0.05). Conclusion The application effect of minimally invasive porcelain veneer restoration technology in the aesthetic restoration of anterior tooth diastema closure is good. It can effectively improve restoration quality, improve periodontal health, enhance aesthetic effect, with low incidence of postoperative complications and high safety, showing deffnite clinical application value.