Abstract: Photosynthesis is the basis of plant growth and development, but also the determinants of the level of plant productivity. Under six adzuki bean-corn intercropping mode, an single factor test was adopt to study photosynthetic characteristic parameters in flower pod stage of adzuki bean and composite economic results in harvest. The results indicated that, the Pn and Tr value of control were the highest, under intercropping mode, (5-2) Pn and Tr value were the highest than others, Cs was opposite. The control was in no shade condition. Correlation analysis showed that, when the intensity of photosynthetic active radiation increases, leading the increasing of net photosynthetic rate, transpiration rate, stomata conductance and the decreasing of intercellular CO2 concentration, the composite economic benefits results showed that the intercropping mode 5-3 was the highest. It reached 31378 yuan/hm2. The final results showed that, it was adaptive for cultivation in midland region in Shanxi Province.