The invention discloses a solid beverage compounded of small molecular Chinese yam peptides and a preparation method of the beverage, belongs to the technical field of solid beverage processing, and provides a high-nutrient functional food lacking in market. The beverage takes sweet potato peptide powder, Chinese yam peptide powder, cauliflower peptide powder, barley peptide powder, brown rice peptide powder, asparagus peptide powder, oyster mushroom peptide powder, mushroom peptide powder, flammulina velutipes peptide powder, lentinus edodes peptide powder, flower mushroom peptide powder, andginseng peptide powder as main materials. The small molecular peptide powders have rich nutrients, and have a significant effect on changing sub-health into healthy physique. Honey is a food for longevity. The above peptide powders are main materials. Besides, the beverage takes such as polysaccharides, vitamins, trace elements, and essential oil as auxiliary materials. The main materials and theauxiliary materials are weighed, mixed according to different proportions, granulated, dried and packaged to prepare peptide particles. The beverage has the efficacy of treating asthenic disease.