Ethylenediamine is an important organic amine widely used in various fields at home and abroad. Aiming at the problems existing in the traditional production process of ethylenediamine, a new method of ethylenediamine hydrochloride reuse is proposed, which solves the recycling problem of ethylenediamine in factories to some extent.This paper first, took industrial ethylenediamine hydrochloride as raw material, heating and melting, used solid sodium hydroxide as a neutralizing agent, passed through a waterblocking reaction, and then obtained an aqueous ethylenediamine by atmospheric distillation, the results showed that the yield of ediamine was the highest when sodium hydroxide was 12 times more than the theoretical dosage; Then, the obtained aqueous ethylenediamine is physically adsorbed and dehydrated by molecular sieve, anhydrous magnesium sulfate and sodium hydroxide solid, and then the extractive distillation method used in the literature is improved, and the ethylenediamine with a purity of 99% was successfully obtained using a single column batch distillation.