In this article, the in vitro degradation methods such as chemistry, enzyme, ultrasonic, irradiation and microbeand their degradative mechanisms were introduced.

• 本文综述了聚乳酸(PLA)及其共聚物的化学降解、酶降解、超声波降解、辐射降解和微生物降解的体外降解方法及降解机理。