Nine-month-old baby constipation does not exist a one-trick laxative method, the need to take the appropriate way to intervene, such as constipation can be used when necessary to soften the stool, oral microbial preparations. Nine-month-old baby constipation, there is no one-stop solution, the intervention needs to be taken in an appropriate way. For infants of this age, complementary foods have been added gradually, and dietary fiber and water intake can be increased moderately. For babies who have not had a bowel movement for several days or have difficulty in defecation, under the guidance of a physician, corkscrew can be used to lubricate the intestinal wall and soften the stool so that it can be easily eliminated, and microbial agents (such as Clostridium Typhimurium) or laxatives (such as polyethylene glycol) can be taken orally. All of the above medications should be used under the guidance of a physician. There is no one-size-fits-all solution for this type of constipation, and active consultation should be recommended for intervention by a specialist.