In order to explore effect of planting mode on photosynthetic characteristics of maize leaves and yield,’Xianyu 335’ was used as experimental materials in the field experiment,and wide/narrow and conventional planting mode were designed,net photosynthetic rate and chlorophyll content of all leaves of a plant of maize and yield were determined.The result showed that the highest net photosynthetic rate increased by 8.0 % under wide/narrow planting than conventional planting through logic equation simulation.Meanwhile,the position of maize leaf of the highest net photosynthetic rate decreased,i.e.,it was 9.9 in conventional cultivation and it was 9.5 in wide/narrow row.In two planting patterns,chlorophyll content of vertical for maize per plant showed ’M’ tendency.The chlorophyll content of the ninth leaf,tenth leaf and eleventh leaf were increased by 10.07%,8.88% and 10.06% in wide/narrow planting than conventional cultivation,respectively.The difference in yield between two planting mode was significant.