Fuente: WIPO "processing tomato" The invention relates to the technical field of black pepper juice processing, in particular to a black pepper juice preparation method which comprises the following preparation steps: preparing beef paste: roasting beef, grinding and mincing, and uniformly mixing with water to obtain the beef paste for later use; frying the fried flour, namely stir-frying the vegetable oil, the hydroxy propyl distarch phosphate and the low-gluten flour to obtain the fried flour for later use; preparing a mixture: stir-frying vegetable oil, fried minced garlic, fried onion and black pepper to obtain the mixture; and preparing black pepper juice: mixing water, the beef paste and the mixture, boiling until boiling, adding white pepper, tomato paste, table salt, monosodium glutamate, chicken powder, sugar, delicate flavor juice and dark soy sauce, uniformly stirring, adding fried flour, and uniformly stirring to obtain the black pepper juice. By means of the process, standardization of black pepper juice production is achieved, the production efficiency is improved, and the flavor and taste of the black pepper juice are guaranteed while the stable quality of each batch of products is guaranteed.