The invention relates to a method for preparing Dabigatran etexilate. The method comprises the specific steps of enabling a compound represented by a formula 1 shown in the description, i.e., 3-[[[2-[[(4-cyanophenyl)amino]methyl]-1-methyl-1H-benzimidazol-5-yl]carbonyl] pyrid-2-ylamino]ethyl propionate to subject to addition reaction with hydroxylamine hydrochloride in the presence of a catalyst in an alcoholic solution, so as to obtain a compound represented by a formula 2 shown in the description, reducing the compound represented by the formula 2 so as to obtain a compound represented by a formula 3 shown in the description, and enabling the compound represented by the formula 3 to subject to amidation reaction with n-hexyl chloroformate in the presence of a catalyst, thereby obtaining a compound represented by a formula 4 shown in the description, i.e., Dabigatran etexilate. Compared with the prior art, the preparation process disclosed by the invention has the advantages that the generation of a large volume of waste acid in the prior art is avoided, the reaction conditions are mild, the control is easy, the yield is high, and the product quality is good, thereby being applicable to industrial production.