The invention relates to a white birch (
carbonic acid) beverage and a preparation process thereof. The white birch (
carbonic acid) beverage is characterized by comprising 1 to 99 percent by weight of white birch extraction liquid, 0.01 to 10 percent by weight of
sweetening agent, 0 to 0.5 percent by weight of acid, 0 to 0.1 percent by weight of edible essence, 0.005 to 0.01 percent by weight of
sodium benzoate or
potassium sorbate and the rest of drinking
purified water. The preparation process comprises the following steps of: (1) peeling of white birch lumber; (2) smashing of the white birch; (3) preparation of white birch extraction liquid; (4) preparation of white birch beverage; (5) sterilization; and (6) (inflation) filling. The white birch (
carbonic acid) beverage is characterized in that white birch lumber (
scrap) extraction liquid is adopted as a main
raw material, so that a strong natural
flavor of white birch is realized, taste is pure, and the stability is good; and the white birch (carbonic acid) beverage is rich in soluble
sugar,
amino acid, vitamins, minerals, aromatic substances and the like, and is a natural beverage which is beneficial to all ages.