A bioabsorbable polymer is a kind of polymer material that can be degraded by enzyme or chemical action in vivo. The development of modern medical science is often inseparable from materials science, especially the development of medical biomaterials. With their own characteristics, bioabsorbable polymers are widely used as implants in cosmetic shell, tissue repair, cardiovascular intervention, tissue engineering, and other major medical fields. Bioabsorbable polymers can be decomposed by enzyme or chemical decomposition after implantation, so there is no need for concerns over permanent implantation or surgical removal, as they can be implanted temporarily to promote the repair and fixation of damaged tissue. The chapter starts with the characteristics of bioabsorbable polymers as implants, focusing on their applications in various aspects, in order to provide some reference for follow-up research.