The invention discloses a sodium vitamin C containing chewable tablet and a preparation method thereof. The chewable tablet comprises, by weight, 20-100 parts of sodium vitamin C, 100-500 parts of starch, 10-30 parts of sweetening agents, 5-20 parts of mannitol, 30-100 parts of microcrystalline cellulose, 5-20 parts of povidone K-30, 20-60 parts of sodium carboxymethyl starch, 5-20 parts of sodium dodecyl sulfate, 1-5 parts of magnesium stearate and 0.1-0.5 part of peppermint essence. The chewable tablet solves the problems that an existing vitamin C chewable tablet is high in acidity after being dissolved, easily affected with damp and not suitable for taking for a long time, seriously stimulates oral cavities, throat esophagi and gastric mucosa and easily absorbs moisture, vitamin C is easily oxidized and easily loses effect in the storage process and the like. The sodium vitamin C containing chewable tablet is simple and convenient to prepare, fragrant and sweet in taste and stable in quality.