Listeria infection in pregnant women may affect the fetus through the placenta and in many cases result in fetal arrest, miscarriage or neonatal death. Listeria monocytogenes is a pathogenic bacterium that is quite common in the environment and is found in soil, plants, biological feed and human feces. Foods placed in the refrigerator are susceptible to infection, such as meat and meat products, milk and dairy products, aquatic products, ready-to-eat foods and vegetables, and in our country cooked food products and ready-to-eat biological products are the most susceptible. Human infection with Listeria can lead to meningitis, septicemia, endocarditis and other diseases. The infection is more serious in pregnant women, which can easily lead to fetal growth stoppage, miscarriage, stillbirth or neonatal death, etc.