The white-rot fungi WY01 as the starting bacteria,using the N+ implantation genetic traits bred a stable and high-yield of laccase with the mutant strain WY02,after 60 days of fermentation culture,the amount of laccase enzyme producted by the start of the bacteria increased from 13.75 U/g to 52.5 U/g that was,the enzyme production increased by 2.85 times.the degradation rates of the lignin,hemicellulose and cellulose were 54.1%,39.1% and 32.8%.FTIR spectrometer was used to analysis the change of lignin grou...