The invention belongs to the field of bulk drug synthesis, and especially relates to a synthetic method of dobutamine hydrochloride. The synthetic method of dobutamine hydrochloride comprises following steps: anisyl acetone, an acid or acid hydrogenation donor, a catalyst, and 3, 4-dimethoxyphenethylamine are added into an organic solvent for mixing, reaction is carried out for 1 to 5h at 30 to 40DEG C; an obtained product is cooled to 10 to 30 DEG C through natural cooling, and filtering is carried out; the pH value of an obtained filtrate is adjusted with a 2% sodium hydroxide aqueous solution to 7 to 8, liquid separating and water washing are carried out; an obtained organic phase is added into concentrated hydrochloric acid for stirring salt forming, the organic phase is collected, and is distilled; an obtained concentrate is subjected to recrystallization in an organic solvent, and vacuum drying is carried out so as to obtain an intermediate; the intermediate is subjected to demethylating at 10 to 20 DEG C under the effect of Lewis acid, and salt forming in concentrated hydrochloric acid is carried out so as to obtain high purity dobutamine hydrochloride. The synthetic methodis capable of avoiding defects in the prior art, a novel dobutamine hydrochloride preparation method is provided, operation is simple, synthesis route is short, the synthetic method is friendly to the environment, yield is high, and cost is low.