Congenital laryngeal tinnitus is caused by excessive softness of the laryngeal tissue, which collapses inward and blocks the airway during inspiration. The cause may be the mother’s improper nutrition and insufficient calcium intake during pregnancy, resulting in a calcium deficiency in the fetus, and excessive softness and relaxation of the laryngeal tissues after birth, which can easily cause the laryngeal tissues to collapse and narrow the laryngeal cavity into a live flap-like tremor during inspiration, resulting in a laryngeal sound similar to a cat’s cry or a bird’s cry. Prevention and treatment measures: 1. Pay attention to the prevention of cold and shock to avoid respiratory tract infection and laryngeal spasm, which may aggravate laryngeal obstruction. 2. Pay attention to maintaining water, electrolytes and acid-base balance. 3.Give adequate amount of calcium, add supplemental food in time and other auxiliary treatment. If the attack is heavy and inspiration is difficult, adjust the infant’s position and take the side position to reduce the symptoms and treat the symptoms. 4, pay attention to the prevention of respiratory tract infection, to 18 to 24 months after the laryngeal cavity increases, laryngeal tissue gradually become normal, laryngeal sound will gradually disappear. 5.Congenital abnormalities of larynx and trachea development, large blood vessel abnormalities and congenital laryngeal cysts and tumors that cause respiratory difficulties must be treated by early surgery.