In summer, high temperature, high humidity, rapid bacterial reproduction, food is easy to rot, spoilage, is the high incidence of intestinal infectious diseases season. It is important to pay attention to dietary safety, to keep a good entrance of diseases by the mouth, and to do a good job in the prevention and control of intestinal infectious diseases. Intestinal infectious diseases mainly include cholera, dysentery, typhoid fever, paratyphoid fever, hepatitis A, hepatitis E, poliomyelitis, etc. These infectious diseases can be transmitted by water, food, contact and so on. In summer, we should pay attention to strengthening the hygiene management of feces, garbage and sewage, pay attention to personal hygiene, develop the habit of washing hands before and after meals, cutting nails and changing clothes, pay attention to drinking water hygiene, don’t drink unclean water, don’t eat rotting and deteriorating food, and especially pay attention to not eating raw or semi-raw seafood or aquatic products. Stored food or processed food should be separated from raw and cooked food, and dishes such as bowls and chopsticks should be boiled and sterilized.”