The invention belongs to the field of fat-reducing foods, and particularly relates to a solid beverage with functions of reducing fat and building muscles. The solid beverage is prepared from the following raw materials in parts by weight: 5-8 parts of ultrafine wheat gluten meal, 4-6 parts of superfine soybean meal, 3-5 parts of superfine coix seed powder, 2-5 parts of superfine corn stigma powder, 2-3 parts of superfine cissus repens powder, 0.5-1 part of withania somnifera extract, 2-3 parts of whey protein powder, 2-4 parts of purified conjac powder, 2-4 parts of flaxseed powder, 1-2 partsof HMB, 1-2 parts of L-arabinose, 0.4-0.5 part of xylooligosaccharide, 0.1-0.5 part of cinnamon polyphenols, 0.1-0.5 part of theobromine and 0.1-0.3 part of green tea polyphenols. The solid beverageis low in cost, has remarkable fat-reducing and muscle-building effects, and cannot generate dependence.