The sucking reflex appears between 0 and 3 months of age, and the infant will suck when something is placed in the infant’s mouth. It disappears on its own 3-4 months after birth, but if it is still present after 1 year of age, a positive sucking reflex indicates a cortical disorder. The presence of the sucking reflex in non-childhood is usually seen in frontal lobe lesions and pseudobulbar palsy. A positive sucking reflex indicates the presence of a disease, which is a serious risk to health and life. What can be done to prevent a positive sucking reflex? There is no effective preventive measure for this disease, early detection and diagnosis, and prevention of further lesions is the key to prevention and treatment of this disease. 1, maintain an optimistic and happy mood. Long-term mental tension, anxiety, irritability, pessimism and other emotions will cause the balance of excitation and inhibition processes in the cerebral cortex to become dysfunctional, so it is necessary to maintain a happy mood. 2, life moderation pay attention to rest, work and rest, life in order, maintain an optimistic, positive, upward attitude towards life is of great help in the prevention of disease. Do tea and meals are regular, survival and living in a regular manner, not overworked, cheerful, and develop good habits of life. 3, a reasonable diet can be more intake of high fiber and fresh vegetables and fruits, balanced nutrition, including protein, sugar, fat, vitamins, trace elements and dietary fiber and other essential nutrients, meat and vegetables, food varieties diversified, give full play to the complementary role of nutrients between foods.