The child blinks normally, 10-15 times per minute, more than 15 times is abnormal, the reasons are considered as follows: 1, refractive abnormalities, refractive error when the child blinks frequently to relieve visual fatigue, should go to the hospital eye examination, give timely treatment. 2, keratitis, keratitis eye discomfort can lead to frequent blinking, accompanied by red eyes, tearing, fear of light, should be given under the guidance of the ophthalmologist anti-infection treatment. 3 The vitamin deficiency causes dry eyes and frequent blinking, the child’s bad habits of picky eating should be corrected and vitamins should be replenished. 4, children’s tic disorder, the eyes appear to blink rapidly, repeatedly and involuntarily with force, mostly accompanied by twitching of facial muscles or accompanied by vocal twitching, obvious when nervous, caused by mental factors, no abnormal vision, the child’s neurology should be examined at the hospital and given Intervention treatment.