A fungus with high poly( 3-hydroxybutyrate-co-4-hydroxybutyrate)( P3 / 4HB) degrading ability was isolated from industrial sewage,and it was identified as Aspergillus species and named as Aspergillus sp. DS0906 through fungal morphology observation and molecular identification of ITS sequence. Aspergillus sp. DS0906 could also degrade poly( hydroxybutyrate)( PHB),poly( hydroxybutyrate-co-hydroxyvalerate)( PHBV) and poly( butylene succinate)( PBS) rather than polylactic acid( PLA) and polycaprolactone( PCL)....