The invention discloses a production method of soy isoflavone with high content of
genistin. The production method comprises the following steps: crushing a
raw material namely
soybean meal, leaching by using
ethanol, filtering and screening by using a screening
machine, distilling to recover
ethanol, precipitating isoflavone by using n-butyl
alcohol, filtering to separate out a
precipitation solid-phase material generated by the isoflavone in an n-butyl
alcohol solution, performing washing separation and purification for the first time, and performing washing separation and purification for the second time. The production method disclosed by the invention has the positive effects that the purity of the obtained soy isoflavone is more than or equal to 90% and the content of
genistin is more than or equal to 80%. The content of
genistin is improved, and the soy isoflavone with high content of genistin has exact curative effects of improving the development of female secondary sex characteristics, preventing and curing
climacteric syndromes, preventing female
senile dementia and height
atrophy, preventing and curing cancers related to
estrogen secretion and the like. Therefore, the misgiving of
consumer groups on the medical healthcare function of soy isoflavone is eliminated, and the production method disclosed by the invention can play an active
promotion effect on the further development of the soy isoflavone industry.