Obtain the optimum reaction condition of synthesizing theaflavins by enzymatic oxidation, synthesizing theaflavins was studied by raw ppo extracted from fresh tea leaves under single factor and orthogonal experimental design. Based on these results, synthesizing theaflavins was also studied by using breaking fresh tea leaves. The result showed that the optimum condition of theaflavins synthesizing is 30℃ temperature is, under this reaction system, pH value of the present system is 4.8, the concentration of ...