Introductions: Mandibular angle fracture accounts for a relatively high rateof mandibular fractures due to traffic accidents. Cone - beam computed tomography shows a major advance in maxillofacial imaging. The surgical method using mini - plates has been widely used globally and has demonstrated many advantages thanks to the continuous improvement in materials, shapes and sizes. Methods: Adescriptive, prospective study was conducted on 34 patients with mandibular angle fracturewho received treatment by operation using mini - plates in Odonto - stomatology center, Hue central hospital, from March 2020 to March 2021. The treatment results based on anatomical, functional and aesthetic criteria were analyzed. Results: The most common age group is 19 - 39 years old: 58.8%. Gender: male 85.3%, female 14.7%. The cause is usually traffic accidents (85.3%). The most common clinical symptom of mandibular angle fracture is pain (94.1%), followed by tenderness anddifficulty opening the jaw (82.4%). Fracture mainly 1 line (50%), 2 lines (41.2%). Displacement of fracture line: 6mm - 10mm (52.9%), ≤ 5mm (41.2%). After 6 months of surgery, overall treatment results: good 94.1%, fair 5.9 %. Conclusions: Cone - beam computed tomography has good quality for diagnosing mandibular angle fractures. The surgical method using mini - plates gives good results in anatomical, functional, and aesthetic aspects.