PURPOSE: A method for manufacturing a functional hair lotion is provided to maintain health hair and to promote blood circulation with enhanced metabolism. CONSTITUTION: A method for manufacturing a functional hair lotion comprises: a step of adding Houttuynia cordata to water and heating at 80-95°;C for 4 hours to prepare Houttuynia cordata extract; a step of adding Phellinus linteus to water and heating at 80-95°;C for 4 hours; a step of adding Coix mayuen Roman to water and heating at 80-90°;C for 2 hours; a step of mixing the extracts and stirring; and a step of Acori graminei Rhizoma powder and green tea powder at 1,000 RPM for 30 minutes to obtain a cosmetic base.본 발명은 어성초 180~200g과 상황버섯 80~120g을 각각 물 2ℓ에 80~95℃로 4시간 가열한 추출물 및 율무 80~120g을 물 2ℓ에 80~90℃로 2시간 가열한 추출물과, 석창포뿌리가루 40~60g와 녹차가루 40~60g 을 교반기에 넣어 혼합하여 제조된 헤어로션의 제조방법에 관한 것이다.