The present invention relates to a kind of preparation method of Remedies for diabetes miglitol intermediate N-hydroxyethyl glucosamine it is characterized in that: take glucose and thanomin as raw material in the presence of solvent and an amount of dewatering agent control temperature of reaction and reaction environment react with metal hydride react complete through the white crystal of aftertreatment refining N-hydroxyethyl glucosamine yield is greater than 95% and purity is greater than 99% (HPLC detection).

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