The invention discloses a specially-mixed sauce for a braising pot, and a preparation method and an application thereof. The specially-mixed sauce comprises, by weight, 340-440 parts of fermented soysauce, 230-310 parts of oyster sauce, 45-65 parts of edible salt, 37-53 parts of chicken essence seasoning, 22-38 parts of monosodium glutamate, 20-34 parts of tomato sauce, 5.1-13.5 parts of white spirit, 4-12 parts of rock sugar, 3-9 parts of honey, 2.5-8 parts of mature vinegar, 1.7-3.7 parts of capsicum oleoresin, 1.2-2.4 parts of a compound emulsifying colorant, 0.95-2.35 parts of white pepper, 0.4-0.8 part of ethyl maltol, 3-9 parts of mixed spice and 80.3-112.9 parts of water. The preparation method comprises the following steps: S1, preparing raw materials; S2, boiling the water in which the spices are placed, and cooling and filtering to obtain spice water; S3, putting the liquid and semi-solid raw materials into a raw material tank, mixing and stirring, then adding the solid rawmaterials, and stirring; S4, feeding the obtained material into a boiling tank for boiling and performing heat preservation at the 100-105 DEG C; and S5, cooling and filling the finally obtained material. The specially-mixed sauce can be used for braising and stir-frying dishes, and has the advantages of enabling foods in the braising pot to be fresh, fragrant and mellow, bright in color and luster and convenient for standardized production.