NOVELTY - A leaven powder preparing method involves selecting raw material by selecting large grain, full, and without insects of wheat, pea, corn, Sorghum, cleaning and drying, and carrying out grain wetting by mixing wheat, pea, corn, Sorghum, sticky rice, rice husk and stillage with water and uniformly stirring. Leaven billet preparation is performed by crushing grain-wet raw material into granule, followed by carrying out spread airing process, pile fermenting, yeast powder preparation and leaven powder preparation.    USE - Method for preparing leaven powder that is utilized for preparing distillery yeast (claimed) in wine making process.    ADVANTAGE - The method enables preparing medicated leaven powder with thin skin, full hypha and thick leaven aroma. The distillery yeast prepared from the medicated leaven powder has higher fermenting power, higher saccharifying power and higher wine making distillation yield in the wine making process.    DETAILED DESCRIPTION - A leaven powder preparing method involves selecting raw material by selecting large grain, full, and without insects of wheat, pea, corn, Sorghum, cleaning and drying, and carrying out grain wetting by mixing 40 wt.% wheat, 10 wt.% pea, 15 wt.% corn, 10 wt.% Sorghum, 5 wt.% sticky rice, 15 wt.% rice husk and 5 wt.% stillage with 5-7 wt.% water, uniformly stirring, naturally placing for 10-14 hours. Leaven billet preparation is performed by crushing grain-wet raw material into 50 meshes size granule, adding 18 wt.% water, uniformly stirring and preparing into 30 cmx 20 cmx 8 cm. Spread airing process is performed by spreading and airing blank at environment temperature for 15-30 minutes. Pile fermentation process is performed by spreading straw fermentation library at a wall thickness of 20 cm, wrapping the straw on the blank with a thickness of 3 cm, stacking 6 layers one by one on a vertical side and heat preserving covered straw for 20-26 days. Yeast powder preparation process is performed by naturally drying obtained fermented blank for 10-20 days and storing for three months after the ground into a baking powder. Medicated leaven powder preparation process is performed by mixing baking powder and six months to seven months old yeast rice with a weight ratio of 1:1. An INDEPENDENT CLAIM is also included for use of the medicated leaven powder for preparing distillery yeast by mixing yeast with 5% powder and other material, mixing, stirring and naturally fermenting for 30-45 days.