Poly (β-hydroxybutyrate-co-β-hydroxyvalerate) (PHBV) has been widely used in potential applications due to its biodegradation

biocompatibility

piezoelectric

and optical activity compared to traditional polymers. However

the poor toughness limits its expansion into industry. This paper reviews the toughness modification of PHBV with nanomaterials during these years. The addition of nanomaterials could be acting as an anisotropic nucleating agent

which improving the crystallization of PHBV

and leading to the improved toughness. Nanocellulose would be used as toughening in PHBV polymer because of its lightweight

biodegradation

and superior mechanical properties compared to other nanomaterials. In the end

some barriers are proposed in this paper and the prospect was also outlooked.