▎ 摘　　要

NOVELTY - Preparing polylactic acid-based foamed particle involves foaming fluid-saturated polylactic acid-based particles to obtain primary foamed particles, and saturating the primary foamed particles with fluid to obtain saturated primary foamed particles. The saturated primary foamed particles are foamed to obtain the polylactic acid-based foamed particles. USE - Method for preparing polylactic acid-based foamed particle. ADVANTAGE - The method enables to prepare polylactic acid-based foamed particle, which is environment-friendly, has mild reaction condition, high expansion ratio and uniform cell size distribution.