Poly (lactic acid) (PLA) as a thermoplastic and biodegradable material holds good prospect in medical, agricultural, apparel, upholstery, hygiene, and other applications in the form of fiber. Among them, the nonwoven produced with PLA fiber is one of the most important forms. In this paper, the biodegradable properties of PLA fiber were reviewed. Moreover, some manufacturing processes of the biodegradable PLA product, such as spunlaced, spunbonded thermal, spunbonded needle punched, melt-blown were also summarized. It also draws some conclusions about the current problems and the prospect.