The invention discloses a preparation method of an internal heat-relieving 
oyster sauce. The method comprises the following steps: uniformly mixing oysters with secondary 
fermentation liquor, conducting 
fermentation at 
room temperature, taking out the oysters, boiling the fermented oysters in water, concentrating decoction, adding edible salt, soy sauce, 
starch and white granulated 
sugar, and conducting one-time blending to obtain a one-time blended solution for later use; uniformly mixing 
orychophragmus violaceus, 
lentinus edodes, garlic, chicken and crab meat, and conducting boiling and concentration to obtain 
seasoning extract for later use; and uniformly mixing the one-time blended solution with the 
seasoning extract, and conducting homogenization and boiling sterilization. According to the invention, the fermented oysters are decocted to obtain a normal 
oyster juice, and the juice is subjected to 
filtration, concentration and blending, and then seasonings are added according to aformula, and the obtained 
oyster sauce is stored or transported at normal temperature. With the addition of the chicken, the crab meat and dried small shrimps, the 
flavor of the oyster sauce is increased. The oyster sauce is used as a food 
seasoning, tastes delicious, and can improve 
appetite. Meanwhile, the addition of the 
fermentation liquor made from components such as aloe and chrysanthemums,the 
disadvantage that oyster sauces are easy to cause internal heat is improved, and the oyster sauce is suitable for wide 
population.