Strabismus is a common disease in children, with a prevalence of about 1-3%. Strabismus is often accompanied by amblyopia, and the timing of surgery needs to be taken into account in treatment. Strabismus is first and foremost a cosmetic concern, and this is the main motivation for patients to seek medical attention. More importantly, strabismus affects the visual function of both eyes, and in severe cases there is no good stereopsis. Stereopsis is an advanced visual function that only humans and higher animals have and is one of the prerequisites for people to do fine work. Without good stereoscopic vision, people will be greatly limited in learning and employment. In principle, pediatric strabismus should be treated surgically as soon as it is detected. Therefore, for congenital strabismus, it is generally accepted at home and abroad that the best results are obtained when surgery is performed between the ages of 1.5 and 2 years. What is the best age for strabismus surgery in children? It depends on the type of strabismus, the condition of both eyes and the time of onset: 1. For strabismus caused by congenital mechanical factors, if it is a ligament or myofascial abnormality, the earlier the surgery, the better. 2. Children with superior oblique muscle paralysis resulting in a crooked head can usually start surgery after the age of 1 year. 3. Most scholars of congenital strabismus believe that surgery within 6-18 months after birth is best for establishing binocular vision. 4.For strabismus with monocular strabismus or amblyopia, surgery is not urgent, but the amblyopia should be treated first and surgery should be performed only after the vision of both eyes is balanced. 5, small degrees of strabismus, intermittent strabismus and strabismus of children with unstable oblique perspective should be closely observed for changes in the pattern, and there is no need to rush to surgery. 6. Children with late onset of strabismus, such as strabismus occurring after the age of 2, should be operated during the age of 3-6. However, for some children who are not very cooperative, let them have a few more follow-up examinations to eliminate their fear and unfamiliarity, and strive for closeness and communication, so that they can cooperate with the examination and finally obtain accurate strabismus examination data and grasp their strabismus situation exactly before deciding whether to operate. In short, “Do not fight an unsure battle, do not fight an unprepared battle.”