Trapezoidal face is a face shape formed due to the enlargement of the jaw angle, mainly bony hypertrophy, a few accompanied by different degrees of bite muscle hypertrophy, which has an impact on their image. For how to improve the trapezoidal face, the cause of occurrence should be clarified and targeted treatment methods should be selected. Some patients with oversized jaw angle can make their face thinner by dealing with the bite muscle. The treatment mainly includes surgical debridement to adjust the width of the lower face; some of the chewing muscles can also be removed to achieve a slimmer face. Face slimming injection is also an effective way to improve trapezoidal face, but the disadvantage is that the effect is short-lived and requires multiple injections. Some patients with mainly bony hypertrophy need to undergo jaw angle plastic surgery, i.e. osteotomy. To avoid incision scar formation, an incision is usually made in the oral mucosa under general anesthesia to free the jawbone surface and saw off or grind off the enlarged bone of the jaw angle for the purpose of changing the face shape. Some patients mainly due to excessive fat in the face, medically known as buccal fat pad or subcutaneous fat accumulation, can achieve the purpose of face slimming by liposuction. Several options for improving the trapezoidal face as mentioned above are recommended to go to a regular hospital and have an individualized treatment plan and targeted treatment by a professional doctor according to the specific situation.