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The degradation of 2,2’,4,4’-tetrabromodiphenyl ether (BDE-47) by Pycnoporus sanguineus was investigated in order to explore the impact of the heavy metal Cu2+ on BDE-47 decomposition and the subsequent formation of metabolites,as well as to further elucidate the degradation mechanism of BDE-47.An increase in degradation rate from 18.63％ to 49.76％ in the first four days and its stabilization at (51.26 ± 0.08)％ in the following days of BDE-47 incubation were observed.The presence of Cu2+ at 1 and 2 mg/L was found to promote the degradation rate to 56.41％ and 60.79％,respectively,whereas higher level of Cu2+ (≥5 mg/L) inhibited the removal of BDE-47.The similar concentration effects of Cu2+ was also found on contents of fungal protein and amounts of metabolites.Both intracellular and extracellular enzymes played certain roles in BDE-47 transportation with the best degradation rate at 27.90％ and 27.67％ on the fourth and third day,individually.During the degradation of BDE-47,four types of hydroxylated polybrominated diphenyl ethers (OH-PBDEs),i.e.,6’-OH-BDE-47,5’-OH-BDE-47,4’-OH-BDE-17,2’-OH-BDE-28,and two bromophenols,i.e.,2,4-DBP and 4-BP were detected and considered as degradation products.These metabolites were further removed by P.sanguineus at rates of 22.42％,23.01％,27.04％,27.96％,64.21％,and 40.62％,respectively.