Abstract: An experiment, with ‘Zhengdan 958’ as the trial material, was carried out for further study on the effect of reducing and postponing nitrogen fertilization on the yield and physiological properties of corn, in which five ways of nitrogen fertilization - no nitrogen fertilization (N0), habitual nitrogen fertilization (N300/2), reducing nitrogen fertilization (N240/2), reducing and postponing nitrogen fertilization (N240/3), reducing and postponing nitrogen fertilization (N200/3) were applied with complete randomized block design, three times’ repetition, planting density being 75000/hm2. The results showed that: compared with habitual nitrogen fertilization (N300/2), reducing nitrogen fertilization (N240/2) made the SPAD value of the blade, PN and the yield of the corn all reduced while the Dualex value increased; the difference being insignificant, which suggested that reducing nitrogen fertilization should be practical in production; compared with habitual nitrogen fertilization (N300/2) and reducing nitrogen fertilization (N240/2), reducing and postponing nitrogen fertilization (N240/3) made the SPAD value and the photosynthetic rate of the blade after 30 days and 45 days of sprouting as well as the yield of the corn all reduced too, while the value of Dualex had a certain increase, the difference being insignificant as well while its difference from reducing and postponing nitrogen fertilization (N200/3) being significant; compared with habitual nitrogen fertilization (N300/2), reducing nitrogen fertilization (N240/2), and reducing and postponing nitrogen fertilization (N200/3), reducing and postponing nitrogen fertilization (N240/3) made the SPAD value and the photosynthetic rate of the blade after 60 days and 75 days of sprouting as well as the yield of the corn all increased while the value of Dualex had a certain decrease, the difference being significant; corn plant nitrogen by way of reducing and postponing nitrogen fertilization (N240/3) could not only meet the demand of nutrition for corn growth, reduce the investment, and improve the yield of the corn as well as nitrogen use efficiency.