A composition comprising novel black ginseng leaf and the extract thereof is provided to reduce the preparation time as compared with the conventional processing processes and increase anti-oxidative activity as compared with the conventional processed ginseng roots, so that the black ginseng leaf and its extract are mass produced. A method for preparing the black ginseng leaf having water content of 14% or less comprises the steps of: washing 4-6 year-old ginseng leaves with water and drying them at 40-60 deg. C for 20-28 hours； steaming the dried ginseng leaves at 85-105 deg. C for 2-4 hours； drying the steamed ginseng leaves at 50-70 deg. C for 9-15 hours； and repeating the steaming and drying steps 9 times. The extract of black ginseng leaf is prepared by dipping pulverized ginseng leaf in water for 3-7 hours, and extracting the dipped ginseng leaf with water, C1-4 lower alcohol or a mixed solvent thereof. A pharmaceutical composition for preventing and treatment of skin diseases caused by oxidative stresses comprises the black ginseng leaf or the extract thereof. 본 발명은 4 년근 이상된 인삼엽을 초음파 세척기로 세척하여 적정 온도 및 시간으로 건조 및 증숙을 반복하는 공정을 통한 구증구폭의 제조방법 및 이에 비하여 시간이 단축되며, 대량생산이 가능한 고온고압을 이용한 제조방법으로부터 제조된 흑인삼엽 및 이의 추출물을 함유하는 조성물에 관한 것으로, 이 조성물은 뛰어난 항산화 효과를 나타내므로 산화적 스트레스로 인한 피부 질환의 예방 및 치료용 피부외용 약학 조성물 및 산화적 스트레스로 인한 피부 질환의 예방 및 개선용 화장료 조성물로 이용될 수 있다.
