Abstract: Study of influence of sowing time and density on dynamic growth of individual and population was conducted in seedling stage of wheat by using the design of continuous increase in sowing density in Linfen Shanxi. The result showed: in the years with high air temperature before winter, with the increase of sowing density which is from 225 to 450 ten thousands grains /hm2, plant height increased, but Tillering per plant, Secondary root per plant and green leaves per plant decreased, there was notable difference among every densities in every traits used in this test but stem leaves, during September 24-October 04, with the deferment of seedtime, plant height, stem leaves and secondary root per plant diminished, there were more Tillering and leaves per plant when wheat was sowed on September 29. the influence of variation coefficient of per plant, stem leaves, secondary root per plant and green leaves per plant was different between sowing time and density. The population before winter was under 12 millions/hm2 sowed on September 24 and over 12 millions/hm2 sowed on September 29 in all 4 sowing quantities. The cross sowed on October 4 and with 2250 thousands /hm2 sowing quantities was ideal in this test.