Abstract: Due to different capillary configurations for silage maize, the drip irrigation technique has not been well utilized currently, resulting in low efficiency of water utilization. With the material of F98 silage maize and the condition of fixed quantities of irrigation and fertilizer, this study aims to examine the appropriate capillary configurations. Six configuration models based on the leaching-pond tests were carried out to evaluate their influences on the photosynthetic characteristic and yield of silage maize, including ZR1 with spacing 20 cm 60 cm, ZR2 with spacing 30 cm 30 cm, ZR3 with spacing 30 cm 45 cm, ZR4 with spacing 25 cm 37.5 cm, ZR5 with spacing 30 cm 50 cm, and ZR6 with spacing 30 cm 40 cm. Results showed that there were similar daily characteristics of net photosynthetic rate, transpiration rate, stomatal conductance, concentration of inter-cell CO₂ and the efficiency of water utilization of silage maize leaves. The net photosynthetic rate and the efficiency of water utilization in ZR1 and ZR2 were generally higher than those in other modes, while transpiration rate, stomatal conductance and concentration of inter-cell CO₂ were lower. Different configurations had significant impacts on yield. The highest yield was obtained from ZR2 mode, which was 2.8%, 58.8%, 67.7%, 53.4% and 35.5% higher than that of ZR1, ZR3, ZR4, ZR5 and ZR6, respectively. ZR1 and ZR2 were the two most suitable capillary configurations for increasing the photosynthesis and yield of silage maize.