Mandible with good shape is the essential element to maintain facial coordination. Mandibular angle plasty is an important part of lower face plasty. Mandibular angle hypertrophy belongs to the common deformity of mandible, which is mainly performed as backward and downward protrusion or eversion of mandibular angle resulting in the widening of lower face. Mandibular angle hypertrophy can be corrected by surgical methods. Common surgical methods include mandibular angle full-thickness osteotomy, mandibular angle sagittal split osteotomy, mandibular angle osteotomy combined with sagittal split osteotomy, and mandibular angle osteotomy combined with other osteotomy. Each operation has its own indications. In recent years, digital technology is applied in the surgical treatment of mandibular angle hypertrophy. Computer-aided design and manufacturing technology and 3D printing technology can design personalized surgical plans for different patients and can be used to make surgical guide plates for intraoperative osteotomy and positioning, so as to improve the accuracy and safety of surgery and obtain the best therapeutic effect. In this paper, the surgical methods of mandibular angle hypertrophy and common complications were reviewed.