Preparation method of licorice oral liquid preparation

The invention discloses a preparation method of a licorice oral liquid preparation. The preparation method comprises the steps of (A) throwing licorice extract in a stainless steel bucket into a smashing machine, performing heating reaction, adding ethyl alcohol and performing stirring to obtain a solution A; (B) collecting supernate, adding the ethyl alcohol, and performing cooling to obtain a solution B; (C) collecting supernate and continuing to perform separation and concentration to obtain a solution C; (D) collecting extracted supernate to obtain a licorice fluid extract concentrated solution; (E) adding ethyl alcohol and purified water according to a inspection result of the concentrated solution; (F) continuing to stir the licorice fluid extract concentrated solution and adding the purified water and the ethyl alcohol into the licorice fluid extract concentrated solution and performing stirring to obtain a medicine liquid; (G) adding ammonia water into the medicine liquid and performing airtight stora