PURPOSE: A producing method of seokim(a natural concentrated fermentation agent) is provided to obtain traditional alcoholic drink or fruit wine without using artificially fermented enzymes or lactic acid. CONSTITUTION: A producing method of seokim(a natural concentrated fermentation agent) comprises the following steps: washing 400g of non-glutinous rice, and soaking the rice in 700-1,000ml of water for 8-12 hours； separating the water from the rice before boiling, and pouring the water back into the non-glutinous rice for soaking for 8-12 hours； cooking the rice in a pot, and reducing the heat when the water starts to boil； cooling the rice by covering the pot with a cold towel, and mixing the rice with yeast in a ratio of 1:0.8-1； fermenting the mixture for 48 hours at 25-28 deg C after kneading the mixture until the mixture turns into a liquid form； and cooling the mixture for 3-6 hours at the temperature lower than 10 deg C, before aging the mixture for 7-10 days at 18-23 deg C.본 발명은 발효 효소나 젖산을 사용하지 않고 천연 농축발효제인 석임을 이용하여 술을 빚을 수 있을 뿐만 아니라 석임은 다양한 종류의 과실을 술로 제조하는데 매우 유용한 발효제로 활용될 수 있다.
