The invention relates to a method for recovering 3-ethoxy-4-methoxy-alpha-[(methylsulfonyl)methyl]-benzenemethanamine, and belongs to the technical field of chemical synthesis. According to the technical scheme, a byproduct compound I of the product is firstly subjected to free treatment to recover a compound III, an intermediate II is subjected to a deamination reaction to generate an intermediate IV, and the intermediate IV is subjected to an addition reaction to generate the compound V. The method has the following beneficial effects: (1) the synthetic method provided by the invention successfully recycles the split by-product, prevents the generation of solid waste, and reduces environmental pollution; and (2) the synthetic method provided by the invention successfully recycles the split by-product, reduces the production cost from the original 1504 yuan/kg to 1002.67 yuan/kg, and can continuously reduce the cost after continuous production.