NOVELTY - Dipotassium glycyrrhizate production involves soaking raw powder of liquorice with 0.5% of aqueous ammonia for three times. Filtered fluid is concentrated to one fifth of the original volume. Concentrated sulfuric acid is added into the filtered fluid until 2-3 pH value. The obtained mixture is filtered to separate precipitate. The obtained precipitate is washed with water 3 times and dried at 60 degrees C. 4-10 folds of absolute ethyl alcohol is added and refluxed for 3 hours. The obtained filtrate is cooled. pH value of filtrate is regulated to 7-8 with 20% of potassium hydroxide.    USE - Method for producing dipotassium glycyrrhizate for use as pharmaceutical chemical for animal e.g. bird or beast.    ADVANTAGE - The dipotassium glycyrrhizate production method is cost-effective and eco-friendly, and enables to produce dipotassium glycyrrhizate, which is widely used in pollution-free livestock breeding and has high purity.    DETAILED DESCRIPTION - Dipotassium glycyrrhizate production involves soaking raw powder of liquorice with 0.5% of aqueous ammonia for three times. Filtered fluid is concentrated to one fifth of the original volume. Concentrated sulfuric acid is added into the filtered fluid until 2-3 pH value. The obtained mixture is filtered to separate precipitate. The obtained precipitate is washed with water 3 times and dried at 60 degrees C. 4-10 folds of absolute ethyl alcohol is added and refluxed for 3 hours. The obtained filtrate is cooled. pH value of filtrate is regulated to 7-8 with 20% of potassium hydroxide. Precipitate is separated by filtering, washed with alcohol and dried at room temperature to obtain tripotassium glycyrrhizinate. The obtained tripotassium glycyrrhizinate is dissolved into glacial acetic acid and filtered to obtain light yellow monopotassium glycyrrhizinate. The obtained light yellow monopotassium glycyrrhizinate is recrystallized with 75% of alcohol to prepare light yellow monopotassium glycyrrhizinate crystal. The obtained crystal is dissolved into 5-10 folds of water and heated to dissolve. 3-10 folds of ethanol is added into the mixture. 1-10 folds of concentrated hydrochloric acid is dissolved, stirred, refluxed, reacted for 6 hours, cooled and filtered to separate solid. The obtained solid is washed with water, dissolved in chloroform and filtered. The chloroform liquid is extracted with 1 mol per liter sodium hydroxide. The obtained aqueous phase is neutralized with hydrochloric acid to 2-3 pH value. Aqueous phase is extracted again for two times with chloroform liquid. The chloroform phase is washed, concentrated and re-crystallized with ethanol to form glycyrrhetinic acid having 90% purity.