PURPOSE: A manufacturing method of Liriope platyphylla with increased contents of bioactive substances is provided by steaming the Liriope platyphylla dried root for a predetermined time at certain temperature, and drying for multiple times. CONSTITUTION: Foreign substance on the dried root of Liriope platyphylla is removed. The dried root of the Liriope platyphylla without the foreign substance is steamed for 6-24 hours at 80-120 deg. C. The steamed Liriope platyphylla is hot air dried for 60-80 hours at 60-80 deg. C, and lyophilized for 45-55 hours at 90-70 deg. C below zero. The foreign substance on the dried root of the Liriope platyphylla is removed. he dried root of the Liriope platyphylla without the foreign substanceis steam processed for 1-3 hours at 80-120 deg. C, and dried. The process of steaming and drying are repeated for 3-9 times. The steamed liriope platyphylla is dried. The steamed Liriope platyphylla has 4-8 times higher content of crude saponin contents, the total phenol materials, and the total flavonoid than Liriope platyphylla without the steaming process. [Reference numerals] (AA) Liriope platyphylla dried root； (BB) Steam(80~120°；C,6~24hours)； (CC) Steam(80~120°；C,1~3hours)； (DD) Drying(60~70°；C,15~24hours)； (EE) 1 to 9 repetitions； (FF) Drying(60~70°；C,48~72hours)； (GG) Steamed Liriope platyphylla본 발명은 생리활성물질의 함량이 증가된 증숙 맥문동의 제조방법에 관한 것이다. 본 발명에 따른 증숙 맥문동은 맥문동 건근을 80~120℃에서 6~24시간 증숙시키거나 또는 맥문동 건근을 80~120℃에서 1~3시간 동안 증숙시키고 건조하는 과정을 3~9회 반복하여 증숙시킴으로써, 이렇게 제조된 증숙 맥문동은 증숙 처리하지 않은 맥문동에 비해 조사포닌, 총페놀물질 및 총플라보노이드 등의 생리활성물질의 함량이 증가되고, 이에 따라 항산화 활성이 증진된다.
