The invention provides a bean curd, which is prepared from the following ingredients in parts by weight: 15-25 parts of soybean protein isolate powder, 5-15 parts of vegetable oil, 5-15 parts of starch, 3-5 parts of white sugar, 3-5 parts of salt, 3-5 parts of monosodium glutamate, 0.5-1 part of glutamine transaminase and 15-30 parts of ice water. According to the invention, the formula and the preparation method of the bean curd are improved so that the obtained bean curd has the advantages of the traditional bean curd, such as low price, rich nutrition and delicate taste, and also is chewy, and crisp and tasty, and therefore, the taste of the traditional bean curd is further improved and the consumers have rich flavor options. A bean curd slicer used in the processing process is simple in structure, rational in design and high in production efficiency; the labor intensity is effectively reduced. In the meantime, the bean curd provided by the invention is quick-frozen food which is still capable of keeping the original taste after being quick-frozen and unfrozen; the bean curd is convenient for the consumers to store.