Two-year-old baby drooling, if it is physiological factors, pay attention to timely cleaning; mouth ulcers caused by, pay attention to adjust the diet structure; intellectual development disorders, as early as possible rehabilitation exercise. 1. physiological factors: children’s salivary glands developed, swallowing function development delay, easy to appear drooling more, as long as the other development is normal, timely cleaning, follow-up observation. 2. Mouth ulcers: a common cause of sudden drooling in children, pay attention to adjusting the diet, appropriate amount of vitamins, trace elements, and keep the mouth clean and hygienic. 3. Intellectual development disorder: commonly found in children with cerebral palsy, in addition to drooling, accompanied by intellectual, motor and other developmental disorders, need to go to the hospital as soon as possible to check, after diagnosis and rehabilitation exercises. If drooling persists more, you need to bring your child to the hospital to determine the cause of drooling and then targeted treatment.