Gastroenteritis is an inflammation of the gastrointestinal mucosa caused by various reasons, and the drugs used are more common. However, due to the special physical condition of pregnant women, in principle, the treatment does not give priority to drugs, but requires timely replenishment of water and electrolytes. Pregnant women will experience diarrhea, vomiting, bloating, loss of appetite and other symptoms, which will lead to water and electrolyte disorders if the symptoms are not relieved. If diarrhea persists for 24-48 hours, antidiarrheal medications such as montelukast are needed; in case of severe vomiting, oral rehydration salts can be taken to compensate for fluid loss due to gastrointestinal inflammation. In case of acute and chronic gastroenteritis due to infection, antibiotic treatment is generally not recommended because some of them have an effect on the development of the fetus. Only in severe cases, doctors will choose sensitive drugs for the pathogen. If a pregnant woman is not allergic to penicillin, she can take drugs such as amoxicillin under the guidance of a doctor, or if she has a penicillin allergy, she can use cephalosporins to fight the infection. Pregnant women with gastroenteritis need to adjust their diet on a daily basis. They can eat a small amount of thin rice and toast to avoid low blood sugar, and pay attention to not overeating and to pay attention to dietary hygiene.