Abstract: Rhizopus oryzae，known as a preferred fungus，is a species with outstanding capacity of almost optically pure L-lactic acid production. Current studies on L -lactic acid fermentation by immobilized Rhizopus oryzae mainly focus on the selection of immobilizing material and the design of new bioreactor for fermentation. Through the review and discussion，immobilized fermentation is considered as an efficient way to reduce the cost and expand the application field of L -lactic acid