▎ 摘　　要

NOVELTY - Modifying polyhydroxyalkanoate, comprises either dispersing nanoparticles in liquid phase environment to obtain a nanoparticle liquid phase dispersion, and dispersing polyhydroxyalkanoate in the nanoparticle liquid phase dispersion; or dispersing the nanoparticles in the liquid phase environment to obtain nanoparticle liquid phase dispersion, dispersing polyhydroxyalkanoate in liquid phase environment to obtain polyhydroxyalkanoate liquid phase dispersion, and dispersing the nanoparticle liquid phase dispersion in the polyhydroxyalkanoate liquid phase dispersion liquid. USE - The method is useful in modifying polyhydroxyalkanoate. ADVANTAGE - The method: utilizes one-step method to achieve high-purity extraction and enhanced toughening modification of polyhydroxyalkanoate. The polyhydroxyalkanoate: can be directly applied in many fields without subsequent modification and processing. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for modified polyhydroxyalkanoate obtained by above method.