Three high starch new maize varieties were Planted at five planting densities under medium fertility condition for studying the relationship between yield and density.The results indicated that the density has significant effect on the yield of maize.A density of 55000-60000 plants per hectare should be adopted in high yield growing system.The maximum yield of "Jidan 79","Jidan 137" and "Jidan 264"was achieved when they were planted at densities of 55100,54300 and 57100 plants per hectare respectively.The effect of density on the quality of maize grains was also analyzed.For getting high and steady yield,it was recommended that the lowest limit of suitable densities should be used.High yield per hectare can be achieved only when the maize were planted at proper density.