For canthoplasty surgery, an incision is made under local anesthesia. The length of the incision is based on the degree of enlargement of the palpebral fissure. Blunt scissors are inserted through the incision and subtly peeled off under the bulbar conjunctiva. The upper and lower sides are peeled off to reach the fornix. The peeling range should include the entire outer canthus to fully loosen the conjunctiva. The outer canthus can be pulled to the lateral canthus wound without tension. Open the outer canthus and sew the temporal tip of the bulbar conjunctiva and the sharp corner of the canthus wound with one stitch first, and then suture the other upper and lower eyelid margin wounds intermittently stitch by stitch. A mattress suture was made with the lateral conjunctiva, and a new needle was inserted into the lateral canthus conjunctiva. The needle was introduced from the skin about 45cm away from the canthus. A small amount of oil gauze was placed on it and then ligated to form a new lateral dome. 5- The sutures were removed in 7 days.