The present invention extracts the saponin component contained in garlic, three vegetables, bellflower, and deodeok in a liquid form and adds it to the feed or fertilizer of agricultural crops, thereby promoting the growth or growth of poultry and agricultural products by the functional component of natural saponin, enhancing immunity, and mortality It provides a method of manufacturing a liquid additive containing saponin that can be effectively applied to the production of functional foods such as functional eggs with a reduction effect. The method for preparing a liquid additive containing saponin of the present invention includes 10 to 20 parts by weight of graviola known as an antioxidant in 100 parts by weight of 1 or 2 or more plants among dried saponin-containing plants, onion, garlic, three vegetables, bellflower, and deodeok, Mixing 10 to 20 parts by weight of noni known to have excellent anti-inflammatory effects and pulverizing them to a size of 1 mm to 2 mm, and the first pulverized saponin-containing plant and graviola, noni, and lemongrass powder from 1 μm to 1 μm through an ultrafine grinder An ultra-fine granulation step of 10 μm size and 3 kg of ultra-fine powder of onion, garlic, three vegetables, bellflower, deodeok, graviola, noni, and lemongrass are mixed in 10L of purified water and aged for 62 hours in a aging room at a temperature of 13-16℃ Wow, the first fermentation step of naturally fermenting for 24 hours at a temperature of 23-26℃ after mixing with 100g of salt and 1kg of raw sugar into the fermentation tank, and after the completion of the first natural fermentation, additional fermentation bacteria were added to the fermentor and then 28-35℃ It characterized in that it comprises a second fermentation step of further fermentation at temperature for 48 hours.본 발명은 마늘, 삼채, 도라지, 더덕 등에 함유된 사포닌 성분을 액상으로 추출하여 가금류의 사료나 농작물의 비료에 첨가시킴으로서 천연 사포닌의 기능성 성분에 의한 가금류와 농산물의 성장 또는 생장 촉진, 면역력강화, 폐사율감소 효과와 더불어 기능성 계란과 같은 기능성 식품들의 생산 등에 유효하게 적용 할 수 있는 사포닌을
