The invention relates to Chinese chestnut bifidusfactor functional instant drink made by the hot processing technology, and the method thereof. The drink takes Chinese chestnut kernel, glutinous rice or corn and mineral water or softened drink water as the main auxiliary raw materials, and the drink is made by mixing dextrin, animal protein or vegetable protein, fat, sweetening agent, flavoring agent, emulsifying agent, stabilizer, improver agent, acidifying agent as well as a small amount of NaHCO3. The solid drink provides the preparation method that the Chinese chestnut kernel, the glutinous rice or the corn is coarsely ground and beated through being added with a proper amount of softened drink water to produce Chinese chestnut liquid with concentration of 1 to 3-12, the solid drink is made through hydrolization, glucoside conversion, emulsification, spray drying or vacuum drying and ultramicro smashing, the powdery drink made through being prepared has the advantages that the powdery drink tasts smooth, the flavor is delicious, the luster is gorgeous, and the original nutrition component and the health care effect of the Chinese chestnut are improved.