Black element composite beverage and preparation method thereof

The invention relates to a black element composite beverage and a preparation method thereof. The black element composite beverage comprises the following components in parts by weight: 8-12 parts of black rice, 8-12 parts of black beans, 3-7 parts of black sesame, 9-11 parts of white granulated sugar, 0.05-0.15 parts of konjaku flour and 0.03-0.06 part of lecithin. The preparation method comprises the following steps: (1) screening raw materials; (2) preparing black rice milk; (3) preparing black bean milk; (4) preparing black sesame milk; (5) blending to obtain a composite beverage; (6) homogenizing; (7) filling, and sterilizing. The blended black element composite beverage disclosed by the invention is suitable for most people and brainworkers especially, has multiple nutritional factors favorable to body health and has a very good slimming effect because of containing very less fat and protein. According to the black element composite beverage, the raw materials are all pure natural materials without any synthetic additives; the black element composite beverage disclosed by the invention can be preserved for a long time by being packaged with a can.