Biocatalysis method for synthesizing resveratrol dimer through resveratrol

The invention discloses a biocatalysis method for synthesizing resveratrol dimer through resveratrol. The biocatalysis method includes: utilizing laccase and Cu2+ to synthesize a flower-like biocatalyst with nanoscale pore diameter and micron-scale size, and catalytically synthesizing at certain temperature and in a condition of feeding air. The biocatalysis method specifically includes followingsteps: (1), utilizing anhydride to chemically modify laccase properly, and utilizing Cu2+ to immobilize modified laccase to obtain the flower-like nano biocatalyst; (2), using resveratrol as a substrate and the nanoflower biocatalyst as a catalyst, feeding air at certain temperature for catalytic reaction for a period of time, filtering, extracting, and performing rotary evaporation to obtain theresveratrol dimer. The resveratrol dimer is catalytically synthesized by utilizing the nanoflower biocatalyst. The method has the advantages that reaction time is shortened, the product is unitary, and yield reaches 41.0% and