The different concentrations of boric acid were used to spray on the leaves and buds to investigate the effects of boron treatment on the physiological metabolism and affinity of selfincompatibility radish during reproductive growth stage.The results showed that spraying of boric acid on the leaves had a significant effect on the physiological metabolism of radish,the higher the concentration of boric acid,the higher the soluble sugar content of the prebolting turnip leaves.But from the bolting period,the effect of boric acid was not obvious.The chlorophyll content under boron treatment was higher than that of the control group.The POD activity of 0.6% boric acid treatment was higher than other treatments.From the budding period,the Pro content was always higher than the control.Spraying boron on buds accelerated the elongation of pollen tube,thereby improved affinity index.It was the best with a concentration of 0.4% boric acid spraying in dual phase,and its affinity index reached 3.08.Totally,boron treatment had significant influences on the physiological metabolism of leaves and affinity of radish during its reproductive growth stage.