The invention discloses a black tomato juice drink and a preparation method thereof, relating to a novel beverage based on the concept of low-carbon, green, nutrition and health care in the technical field of beverage and its preparation method. The invention is characterized by a special formula. A natural low sugar fashion fruit juice without preservatives and chemical pigments is prepared by carrying out an organic integration and deep processing of non-transgenic rare black tomato and black raspberry, with rich fragrance, sweet and sour. The invention is also characterized by simple technology. The deep processing process is scientific and pragmatic, allows the black tomato juice drink to be convenient for preservation and transportation, and prolongs the eco-industrial chain. The anthocyanidin, lycopene, folic acid, nicotinic acid, vitamin E, vitamin C, selenium and other nutrition components, peculiar to the black tomato and black raspberry, and crude fibers, organic acid and the like, are kept in the greatest degree. Compared with other juice drinks, the black tomato juice has incomparable advantages of enhancing human anti-oxidation and immunity, resisting aging, helping beauty treatment, resisting three-high disease and preventing cancers through long-term drinking.