The present disclosure discloses an organic acid salt of nicotinamide riboside (NR), where an organic acid is selected from the group consisting of malic acid, citric acid, royal jelly acid, and the like, and a molar ratio of the NR to the organic acid is 1:2 or 1:1. The present disclosure also discloses a compound composition of an organic acid salt of NR and a carrier, where the carrier is selected from the group consisting of niacin, glutamic acid, royal jelly acid, nervonic acid, microcrystalline cellulose (MCC), and apple cider vinegar powder. The present disclosure adopts an organic acid with strong acidity, and such an organic acid can form an intimate ion pair with NR and show some hydrophobicity, which improves the stability of NR. The carrier can prevent moisture penetration and improve the water resistance of the organic acid salt.