Femtosecond laser is the most advanced surgical method in myopia laser surgery. Femtosecond laser technology is the frontier technology in the field of ophthalmic laser, which refers to the use of femtosecond laser system instead of mechanical lamellar knife to make corneal flap. Femtosecond laser is an infrared laser that runs in pulse form. Its duration is very short, and it can be focused on an area much smaller than the diameter of hair for fine processing. It can cut the cornea with any depth and shape under the precise control of computer program, so femtosecond laser can not only make ultra-thin corneal flap, but also preset the thickness and diameter of corneal flap, the position of corneal pedicle and the angle of edge incision according to the requirements of surgeons, so as to realize targeted personalized cutting according to different conditions of different patients.