The invention discloses a kudzu vine root and cassia seed solid beverage and a preparation method thereof. The beverage is prepared from 2-4 g of kudzu vine roots, 2-4 g of cassia seeds, 0.5-1.5 g of hawthorn fruits, 0.5-1.5 g of allium macrostemon, 0.5-1.1 g of purple perilla, 0.5-1.1 g of L-calcium aspartate, 0.001-0.008 g of vitamin B3, 0.008-0.02 g of taurine, 0.2-0.4 g of L-carnitine and 0.005-0.03 g of sucralose. The kudzu vine roots, the hawthorn fruits, the allium macrostemon and the purple perilla are dried and ground into superfine powder A; the cassia seeds are roasted, smashed and ground into superfine powder B, the superfine powder is mixed with the superfine powder A, the L-calcium aspartate, the vitamin B3, the taurine, the L-carnitine and the sucralose, bagged and packaged, and therefore the beverage is obtained. The compatibility of medicines is simple, the preparation method is simple, and no toxic or side effect is produced. In the whole process, no any waste is produced, and the dietary pattern of people can be improved; the kudzu vine root and cassia seed solid beverage is used for regulating lipid, decreasing blood pressure and blood glucose, inhibiting blood platelet activity, and preventing and treating cardiovascular and cerebrovascular diseases and is suitable for sub-health population.