According to the investigation, the main reasons are as follows: First, the sheep grow fat and tender meat after being nourished in spring and winter, and the soup stewed with its meat is mellow and tasteless. Therefore, there is a saying of mutton contestants in June; Secondly, in dog days, heat accumulates in the human body, and eating mutton after sleeping in summer is said to clean the stomach, relieve summer heat and eliminate dampness. In summer, people have more opportunities to eat fruits and vegetables raw, which is easy to cause indigestion. Drinking cold drinks and cold beer can easily make the stomach cold, while mutton can warm the stomach and produce fluid, protect the gastrointestinal tract and dispel the accumulated heat in the body. Third, there is a saying in Chinese medicine that winter diseases are treated in summer. Eating mutton in dog days will make you strong in winter, especially to keep out the cold. It can prevent all diseases induced by cold pathogens and has a certain therapeutic effect.