The mandible and the bite muscle dominate the factors influencing the lower facial profile, but there are few studies on the comparison of soft and hard tissues in the mandibular region of beautiful face shapes (inverted triangle face, oval face) and general face shapes (face shapes other than beautiful face shapes). The width of the bony and soft tissues below the beautiful face shape is smaller than that of the general face shape. There is a quantitative difference in the morphology of the lower part of the beautiful face shape and the general face shape, and the subjective visual visualization describes the inverted triangle face as the melon face and the oval face as the goose egg face. However, there is a difference in the size of the facial contour in the individual, so we cannot mechanically take the numerical value as the only standard, but need to refer to the specific value under the premise of ensuring the proportional harmony. Barrett’s idea of “the width of the lower face is 10% shorter than the width of the cheek is ideal” as the clinical “gold standard” has been recognized by most craniofacial surgeons. The shape of the mandibular region of a beautiful face is smaller than that of an average face. The width and height of the mandibular branch are important influencing factors of the lower facial contour, especially the height of the mandibular branch has an important influence on the whole facial contour. When shaping the jaw angle area for general face shape, it is necessary to reshape the jaw branch shape to make it close to the target value of beautiful face shape. At present, a combination of multiple methods of osteotomy is being performed not only for the angle of the jaw, but also for the mandibular branch and the body of the jaw, with the aim of a more adequate amount of osteotomy and a more perfect reshaping of the jaw. A beautiful face with a shorter anterior and posterior jawbone and a smaller bite. The longer the anterior and posterior length of the jawbone, the stronger the bite muscle must be to drive it. It is suggested that there may be a positive correlation between the anterior-posterior length of the mandible and the size of the bite muscle, which can be an important basis for understanding the relationship between the soft and hard tissues in the mandibular region. The bite muscle has a significant impact on facial contour. When comparing inverted triangular faces with square faces, some scholars found that there was no difference in the width of the bony underside of the two, while the difference in the bite muscle was significant. Therefore, bite muscle contouring and mandibular reshaping need to be included in the facial contouring program at the same time and treated simultaneously or separately, depending on the actual situation. The present analysis differs from Dutedoo and Vilmann’s view that the occlusal muscle coexists with mandibular hypertrophy, probably because the thickness of the mandibular angle is a broad regional concept, and its thickness pattern varies widely depending on the irregular morphology of the individual mandible and the morphology and strength of the masticatory muscles, so there is no agreement regarding its measurement and quantification criteria. Mandibular morphology (especially the mandibular angle) plays an extremely important role in the lower facial contour, and there is still little information about the 3D CT measurement and statistical analysis of the angle of the mandible for a beautiful face. Some scholars believe that the normal angle is 120°; however, some scholars believe that the normal angle is about 126°; a doctor once measured 90 cases of pretty faces by 3D CT and came up with an average jaw angle of 116°; thus, it can be seen that there is no consensus on what range of jaw angle is considered ideal. In terms of the measured values of soft and hard tissues in the jaw angle area of the pretty face type and the general face type, the length, width and thickness of various soft and hard tissues of the former are smaller than those of the latter, except for the thick jaw angle, which indicates that the overall facial contour of the pretty face type is smaller and more delicate; the angle of the jaw angle is significantly larger than that of the general face type, reflecting that the curve of the facial contour under the pretty face type is softer, and the appropriate angle of the jaw angle is also one of the main goals of jaw The appropriate angle of the jaw is also one of the main goals of jaw angle regional plastic surgery. In clinical work, the data related to the jaw angle area of the pretty face can be used as an important reference basis for facial contour reshaping to minimize the probability of superficiality or overkill.