The present invention relates to a composition for preventing hair loss and promoting hair growth. More specifically, the present invention relates to a composition for preventing hair loss and promoting hair growth, containing a mixture obtained by mixing and aging a BCA (bentonite, chitosan, and avocado) composite fermented product and a forllicle stem cell extract as active ingredients.본 발명은 탈모방지 및 모발성장 조성물에 관한 것으로, 더욱 상세하게는 BCA 복합 발효물에 모낭줄기세포 추출물을 혼합하여 숙성시킨 것을 유효성분으로 포함하는, 탈모방지 및 모발성장 조성물에 관한 것이다.