The operation of double eyelid is simple, and with the development of medicine, the technology of double eyelid cutting is becoming more and more mature, the probability of failure is generally smaller, but there is still the phenomenon of surgical failure. In fact, the main reason for the failure of the surgery is that the candidate ignores the risk of double eyelid surgery and chooses an irregular plastic medical institution to do the surgery, while some so-called plastic surgeons have varying technical abilities, resulting in poor surgical results and even eyelid ectropion, difficulty in closing the eyelid, and obvious scars. When performing double eyelid surgery, the surgeon not only needs to have excellent surgical skills, a good aesthetic point of view, but also a lot of design experience, as well as an accurate grasp of the eye and facial anatomy and the psychology of the candidate. Incorrect design often results in poor heavy eyelid curvature and shape, even if the curvature is naturally rounded, but the width and type are not suitable for their occupational characteristics and face shape, which is unacceptable to the candidate after surgery and requires a redesign repair.