The invention relates to a simvastatin tablet and a preparation method of the simvastatin tablet. The simvastatin tablet is prepared from the following raw materials in parts by weight: 5-15 parts ofsimvastatin, 10-30 parts of corn starch, 60-80 parts of microcrystalline cellulose, 5-10 parts of water, and 1.5-3 parts of magnesium stearate. The preparation method comprises the following steps: blending, granulating, drying, size stabilization, total blending, tabletting and coating. The simvastatin tablet disclosed by the invention forms a solid preparation suitable for oral administration, the in-vitro dissolution rate and dissolution degree of simvastatin are obviously increased, the bioavailability is effectively improved, so that the curative effects of the medicine and the complianceof patients are improved, and the application prospect is good.