The preparation method of the present invention for the preparation of vanillin amine hydrochloride is described in detail in the following steps: A, 4-hydroxy-3-methoxybenzaldehyde oxime was used as raw material, and ethanol was used as solvent; firstly, 133.6 g (0.80 mol) of 4-hydroxy-3-methoxybenzaldehyde oxime was added into a 2L three-necked flask fitted with a stirrer and a thermometer, and then 1,400mL of ethanol and 13.0 g of an aluminum-zinc Nickel composite catalyst, under the condition of passing hydrogen for protection, heating to 40°C, the reaction for 8 hours; B, after the completion of the reaction filtration (the filtrate residue is the unreacted catalyst, can be recycled), in the filtrate add 70mL of hydrochloric acid with a mass concentration of 30%, adjusting the filtrate pH to 1, precipitated white crystals, filtration to isolate the white crystals, drying in vacuum, to obtain vanillin amine hydrochloride 136.8 g, yield 90.5%.
