The invention discloses saccharomycete for hydrolyzing starch, producing lactic acid and fixing nitrogen, as well as application thereof. The saccharomycete belongs to Candida tropicalis, and is preserved in the China Center for Type Culture Collection (CCTCC) with the preservation number of CCTCC M 2011495. The saccharomycete can be used for hydrolyzing starch, secreting lactic acid and self-producing fixed nitrogen, becomes the first multifunctional novel saccharomycete strain in current report, can be applied to lactic acid fermentation and single-cell protein production, or serves as an active strain source in microbial nitrogenous fertilizer, and has an extremely wide application prospect in food industry, agriculture, pharmacy and other fields.