As the primary load-bearing zone of facial aesthetics, the morphological characteristics of the lower third of the face directly determine the overall aesthetic coordination of the face. As the osseous supporting structure of the oral and maxillofacial region, the dental arch exerts a profound regulatory effect on the aesthetic performance of the lower third of the face through the "bone-tooth-soft tissue" conduction pathway. With the application of three-dimensional quantitative technology in the field of stomatology, the research on the correlation between dental arch form parameters (width, length, arch type, etc.) and aesthetic indicators of the lower third of the face has become a research hotspot in the field of orthodontic aesthetics. This paper reviews the quantitative correlation between dental arch form and lower third of the face aesthetics from four dimensions: the quantitative parameter system of dental arch form, the correlation characteristics between core dental arch parameters and lower third of the face aesthetics, the aesthetic impact of abnormal dental arch form, and clinical orthodontic strategies, aiming to provide a theoretical reference for aesthetic diagnosis and treatment in orthodontics.