The invention provides a tartar sauce for beef with brown sauce and a preparation method thereof. The tartar sauce is prepared from salad oil, beef tallow, raw onion, raw garlic, fresh beef, spices, beef extract, yeast extract, soybean paste, light soy sauce, sesame oil, chilli oil and a fresh raising agent in a certain proportion. The production process of the tartar sauce comprises the steps ofbig fire, small fire, slow fire and the like, the prepared tartar sauce for beef with brown sauce has rich and mellow taste, produces sensual appeal when entering into a mouth and has high nutrient components, and no antiseptic or artificial colour is added, thus the prepared tartar sauce for beef with brown sauce is more beneficial to physical health, can be eaten together with pickles, can be used for tossing vegetables, noodles, Rouga Mo and the like and has the advantages of good taste, good nutrition, low cost and the like; and besides, the quality guarantee period of the prepared tartarsauce for beef with brown sauce can reach 60 days.