(d)-2- amino butanol is a chiral amino alcohol, which is widely used in medicine, fine chemicals, materials and other fields, and can be obtained by splitting its racemic 2- amino butanol. The widely used resolution method of 2- aminobutyl alcohol is to use l(+)- tartaric acid as resolution reagent, form two diastereomeric salts with (dl)-2- aminobutyl alcohol, l(+)- tartrate of acid (d)-2- aminobutyl alcohol and l(+)- tartrate of acid (l)-2- aminobutyl alcohol, and then use two diastereomeric salts. The existing reduction methods of diastereomeric salts include ion exchange resin method and chemical method. Chemical methods, such as the chemical resolution method disclosed by Guangzhou Chemical Industry Co., Ltd. in February 20 14, Volume 42, Issue 24, pages 82-84, include adding ca(oh)2 to l(+)- tartrate of (d)-2- aminobutyl, and adjusting the ph to 6544. This method needs a lot of inorganic alkali, which will produce waste on the one hand and affect the product quality on the other. An ion exchange resin method, such as the manufacturing method of d-2- amino butyl-1 disclosed in patent CN17a, separates two diastereomeric salts, in which the right racemic salt is released through the resin and becomes d- amino butyl. The specific steps are as follows: the right-handed resolution is diluted with deionized water, adsorbed with cation exchange resin, eluted with ammonia water, and the eluent is distilled under reduced pressure at normal pressure to obtain the right-handed amino butanol. The washing and regeneration steps of ion exchange resin need to consume a lot of acid and alkali, and this process will produce a lot of wastewater.