The invention discloses a process for extracting vanillin by using molecular imprinting. The process for extracting the vanillin by using molecular imprinting comprises the steps of using a high-pressure homogenization method to extract the vanillin from vanilla beans so as to obtain a crude extract; and then using a prepared magnetic molecularly imprinted polymer to adsorb the vanillin in the crude extract so as to simply and efficiently realize separation of the vanillin. The process for extracting the vanillin by using molecular imprinting, disclosed by the invention, has the advantages that the vanillin of the vanilla beans is extracted from the vanilla beans, the process is environmentally friendly, the extraction rate is high, the product quality is good, the production period is short, the operation is convenient, the cost is lower, and the process is suitable for industrial production.