Feed for preventing pet from diarrhoea and preparation method

The invention discloses a preparation method of a feed for preventing a pet from diarrhoea. The method comprises the following steps of washing 6-8 parts by mass of folium syringae and 6-8 parts by mass of alfalfa in boiling water for 1-3 times, performing draining, performing drying in sunshine, and performing grinding to obtain folium syringae powder and alfalfa meal; adding water to the folium syringae powder, the alfalfa meal, 13-15 parts by mass of wheat gluten, 2-4 parts by mass of dried potato powder, 10-12 parts by mass of meat powder, 1-3 parts by mass of threonine, 1-3 parts by mass of chicken oil and 15-25 parts by mass of corn flour, performing uniform mixing to obtain a mixture, enabling the mixture to be placed in the sterile environment of 0-4 DEG C for 2-3 days, then taking out the placed mixture, performing granulation, and performing drying. The feed not only comprises nutrient substances capable of providing sufficient nutrients, but also has a certain efficacy of preventing the pet from th