The invention relates to a preparation method of menthyl salicylate, which comprises the following steps: (1) mixing methyl salicylate, menthol and anhydrous potassium carbonate in a mass ratio of (1-1.8):(1-1.2):(0.03-0.05), carrying out microwave radiation treatment, refluxing, and separating out the generated methanol to obtain crude menthyl salicylate, wherein the microwave radiation power is 200-400w, the microwave radiation time is 15-45 minutes, and the reflux reaction temperature is 145-175 DEG C; and (2) cleaning the crude menthyl salicylate with distilled water, drying the crude menthyl salicylate with a desiccant for 24 hours, and distilling under reduced pressure to obtain the fraction which is the menthyl salicylate. The method for preparing the menthyl salicylate has the advantages of high yield and short reaction time.