The invention discloses a sport-type nutritional supplement and a preparation method thereof, wherein the sport-type nutritional supplement is composed of the following raw materials in parts by weight: 100-200 parts of a pseudo-ginseng extract, 100-200 parts of a ginseng extract, 200-300 parts of calcium acetate, 200-300 parts of hydrolyzate of egg yolk powder, 300-500 parts of corn oligopeptidepowder, 0-500 parts of branched-chain amino acid, 5-10 parts of taurine, 50-100 parts of L-carnitine, 1-2 parts of B vitamins, 200-300 parts of sodium chloride, 200-300 parts of potassium citrate, 2000-3000 parts of isomaltooligosaccharide, 10-20 parts of sucralose, 1000-2000 parts of maltodextrin, 50-200 parts of povidone, and 50-100 parts of polyethylene glycol. The sport-type nutritional supplement disclosed by the invention can fully promote energy metabolism in a body, promote fat decomposition in the body, promote skeleton and muscle growth, effectively alleviate athletic fatigue, prevent muscle spasm and improve athletic ability while reducing the amount of high-energy carbohydrates.