The role and efficacy of infant probiotics is mainly to help babies establish and maintain normal intestinal flora, and to assist in the treatment of constipation and diarrhea. After a few days after birth, bacteria will colonize the gastrointestinal tract. Probiotics are able to resist the colonization of pathogenic bacteria. Current research suggests that if the flora is established too late or poorly, it may affect the development of many diseases. Probiotics can improve the number of intestinal flora, help to improve the function of the gastrointestinal tract, promote the function of digestion and absorption, improve constipation and diarrhea symptoms, which is conducive to the growth and development of infants and children. Probiotics are suitable for intestinal flora disorders, its adverse reactions and contraindications are not yet clear, the use of medication must be used under the guidance of a doctor, pay attention to the taking of lukewarm water, to avoid the temperature of the water is too hot to kill the flora.