The invention discloses a method for preparing flavored bittern bean curd and belongs to the technical field of food processing. The method comprises the following steps: dissolving soy proteins, performing heat treatment, adding edible oil, sugar, functional food ingredients and other pretreated food materials to pass through a colloid mill, and forming emulsion or emulsified paste; preparing a calcium magnesium salt mixture into suspension, adding the suspension into the emulsion or emulsified paste, uniformly mixing, filling and sealing while the mixture is hot, preserving the temperature, and obtaining novel series of bean curd products which have the similarly good taste as bittern bean curd manufactured by a traditional bean curd process and are rich in flavors, colors and nutritional quality, wherein the product can be stored under the refrigeration condition of 0-4 DEG C for two weeks. The bittern bean curd is prepared by utilizing the method, the production process is simple, the stability is high, the other food materials can be effectively added, and the additional values and varieties of the products can be greatly increased. Meanwhile, according to the method, because processes of forming bean curd, preserving the temperature, breaking and squeezing are omitted, the product can be pasteurized again after packaging, so that the shelf life of the product is greatly improved.