The present invention discloses a tea-flavored chili sauce and a preparation method thereof. The tea-flavored chili sauce is characterized by being prepared by the following raw materials in parts by weight: 200-210 parts of dried red chilies, 8-9 parts of wheat flour, 10-11 parts of tea leaves, 20-21 parts of dried blueberries, 4-5 parts of euryale ferox, 2-3 mint leaves, 1-2 parts of cassia seeds, 4-5 parts of panax ginseng leaves, 12-13 parts of mesona chinensis, 35-40 parts of milk powder, 10-11 parts of lactobacillus plantarum, 30-35 parts of edible salt, 25-30 parts of sucrose and 0.4-0.5 parts of CaCl<2>. The tea-flavored chili sauce uses dried red chilies as raw materials to reduce concentrated technological processes, the lactobacillus plantarum used for fermentation of the chili sauce is acid-resistant and salt-resistant, the fermented chili sauce has high quality, the added CaCl<2>, edible salt and sucrose have moderate amount, and thus the chilies have moderate hardness, good taste, and good salty taste and color and luster. The milk powder added in the late fermentation can be fermented into a gel to coat the surfaces of chilies, reduce stimulation to gastric mucoca, and the mesona chinensis can avoid excessive internal heat, and in addition the tea-flavored chili sauce can also refresh oneself.