Abstract: Under field conditions,study on the effects of sowing date and density ratio on yield and component factors of high yield wheat variety Luomai 23,2 years with Luomai 23 as test material,using randomized block design.The results showed：different sowing date,panicle number,grain number per spike and grain yield were significantly higher in October 5th and October 25th than in October 15th,5.05% and 4.19%,6.71% and 6.27%,15.83% and 16.67%,respectively,compared with October 25th;1 000 grain weight was higher in October 5th than in October 25th,higher in October 5th than in October 15th and 2.76% in October 25th and 6.44% in October 15th,compared with 3.58% higher in October 15th than in October 25th;different density,spike number 262.5 kg/hm^2 and 375.0 kg/hm^2 were significantly higher than that of 150.0 kg/hm^2;respectively 3.55% and 3.95% higher than 150.0 kg/hm^2;262.5 kg/hm^2 yield was significantly higher than that of 150.0 kg/hm^2 and 375.0 kg/hm^2;150.0 kg/hm^2 and 375.0 kg/hm^2 were respectively 3.56% and 4.54%;there was no significant difference between grain number and grain weight among different density.Under the interaction of 2 factors,the number of October15th sowing with 262.5 kg/hm^2 was the highest;the number of grain per spike of the October 5th seeding configuration150.0 kg/hm^2 was the highest,and the 1 000 grain weight of the October 5th seeding configuration 262.5 kg/hm^2 was the highest,and the yield was sown in October 15th and 262.5 kg/hm^2 can reach higher yield.