The invention relates to a process for synthesizing a gefarnate compound, which comprises the following steps of: stirring and mixing triethyl orthoacetate, nerolidol and isobutyric acid, performing heating reaction, and distilling under reduced pressure to obtain an intermediate one; adding the intermediate one into ethanol solution of potassium hydroxide, performing heating reaction, distilling to remove ethanol, extracting, taking an aqueous phase, regulating the pH value by using hydrochloric acid, extracting again, taking an organic phase, washing with water, drying, and distilling off the solvent under reduced pressure to obtain an intermediate two; adding acetaldehyde, geraniol and dichloromethane into the intermediate two, reducing the temperature to -5DEG C, slowly dripping diisopropyl azodicarboxylate, keeping the temperature to react for 2 hours, filtering, washing for three times by using 5 percent sodium bicarbonate, washing for three times by using water, drying, and distilling off the solvent under reduced pressure to obtain faint yellow oily liquid, namely the gefarnate product.