The invention discloses a rhizoma pinellinae praeparata processing method, product and application thereof. The rhizoma pinellinae praeparata processing method comprises steps of slicing, preparing licorice root lime liquor, rotating and immersing with constant temperature and pressure, and drying, thus obtaining the decoction pieces of the rhizoma pinellinae praeparata. According to the rhizoma pinellinae praeparata processing method provided by the invention, the production process of the rhizoma pinellinae praeparata is optimized under the method guidance of the Chinese Pharmacopoeia, i.e.,directly immersing in the licorice root lime liquor instead of a traditional method of first immersing in drinking water until the innermost part is soaked and then immersing in the licorice root lime water; by combining with the technique of rotating and immersing with constant temperature and pressure, the original processing time of 10 days is shortened to 1.2-2 days, thereby the processing time is greatly shortened, the loss of active ingredients is reduced, the appearance and internal quality of the product are improved, and the stability and reproducibility of the variety process is ensured.