Preparation method of bromomethylcyclohexane

The invention relates to a preparation method of bromomethylcyclohexane. The method comprises the steps that 1, alkali and cyclohexylmethanol are added into an organic solvent, then a compound in theformula (I) shown in the description is added dropwise, and esterification is conducted to obtain an organic-phase intermediate filtrate, wherein R is C1-12 alkyl or C1-12 halogen alkyl or C3-8 naphthenic base or phenyl or benzyl or aromatic hydrocarbon, X is a halogen atom, and the molar radio of the cyclohexylmethanol to the compound in the formula (I) is 1:1-1:2; 2, a bromide and a crown ethercatalyst are added into the obtained organic-phase intermediate filtrate for bromination reaction to obtain reaction liquid, then through filtering, abraum salt is removed, through rectification, a crude bromomethylcyclohexane product is obtained, and then through drying, a finished bromomethylcyclohexane product is obtained. The method has the advantages that high-salinity wastewater is reduced,reaction time is shortened,