Candida albicans is a kind of fungus, Candida albicans belongs to Candida, which is a kind of Candida in Cryptococcaceae, and is the most pathogenic one among Candida group, so it is mainly Candida albicans that causes human candidiasis. Candida albicans is a single-celled yeast-like fungus, with a round or oval body and positive Gram stain. It grows well on sand medium, greenhouse or 37℃ gestation 1-3 days to grow colonies, smooth surface, not heat resistant, grow more suitable alkaline environment, can ferment glucose, maltose, and produce acid or gas. It has complete thin wall, cell membrane, cytoplasm and nucleus, virulence mainly lies in invasive power, where adhesion and extracellular enzyme role is more certain.