Preparation method of benzylamine compound

The invention discloses a preparation method of a benzylamine compound. The method adopting an aryl methane compound as a raw material comprises the following steps: carrying out an NBS bromination reaction to synthesize a bromobenzyl compound, carrying out an N-hydrocarbylation reaction to synthesize a 1-benzylpyrrolidyl-2,5-dione compound, and carrying out a hydrolyzing reaction to obtain the benzylamine compound. The preparation method of the benzylamine compound has the advantages of wide source of the raw material, no need of separation of intermediates generated in above reactions, realization of an all-in-a-pot technology, simple operation, mild reaction conditions, high reaction yield, few three wastes, and convenience for industrial production.