The invention relates to a stewed beef sauce bag and a preparation method thereof. The stewed beef sauce bag is prepared from the following raw materials in parts by weight: 30-35 parts of palm oil, 5-10 parts of refined beef lard, 10-15 parts of fresh beef, 8-10 parts of ginger, 15-20 parts of raw onion, 10-15 parts of raw garlic, 3-5 parts of dry yellow soybean sauce, 5-7 parts of soy sauce, 4-5 parts of table salt, 1-1.5 parts of white granulated sugar, 2-2.5 parts of monosodium glutamate, 1-1.5 parts of hot pepper powder, 0.2-0.3 part of star aniseed powder, 0.2-0.3 part of cassia bark powder, 0.3-0.4 part of pepper powder, 0.5-0.6 part of yeast extract, 0.5-0.6 part of HVP (Hydrolyzed Vegetable Protein), 1.5-2 parts of beef cream essence, 1-1.5 parts of hot reaction beef powder and 0.2-0.3 part of shallot oily essence. Due to the adoption of the sauce bag, the kitchen flavor characteristic can be displayed, and the requirement on the shelf life of industrial foods is met simultaneously.