Abstract: 【Objective】 To study the effects of uniform sowing on population structure and yield of late sowing winter wheat in northern Xinjiang, and to provide basis for reasonable dense planting of late sowing wheat in the region. 【Methods】 Delayed sowing time (sowing date was October 26, witha delay of 16~ 38 d) was used to analyze the effects of late sowingand uniform sowing on the population structue and yield of winter wheat during the appropriate sowing period of winter wheat (September 20~ 30), and differe nt planting densities were set up in the field:525×10⁴ grains/hm²(D₁, the conventional sowing density of the field),600×10⁴ grains/hm² (D₂), 675×10⁴ grains/hm²(D₃), 750×10⁴ grains/hm²(D₄),825×10⁴ grains/hm²(D₅), and 900×10⁴ grains/hm²(D₆), to compare the population structure of late sowing winter wheat with different planting densities. 【Results】 Under late sowing conditions, with the increase of planting density, the number of stems and tillers increased, with the D₁ treatment having the highest tiller success rate of 46.08%, which was higher than the other treatments by 2. 01%, 8. 94%, 29. 58%, 43. 02%, and 44. 63%, in that order;Plant height increased with increasing density, and all D₁ treatments differed significantly from D₅ and D₆ treatments, and basalinternode 1 and internode 2 coarseness gradually decreased; the difference betweenD₁ treatment and D₅ and D₆ treatment was significant,With D₃ treatment (6.75 million grains /hm²), the leaf area of each leaf layer at flowering stage reached the maximumvalue (27.58 cm², 25.75 cm², 18.45 cm²),andthe leaf area index LAI also reached the maximum value (6.93), and the light transmission from floweringstage to wax ripening stage decreased the least among all treatments. The maximum yield was 8,908.47kg/hm² under D₅ treatment,and the minimum yield was 7,320.47 kg/hm² under D₁ treatment. 【Conclusion】 Under the condition of late sowing, the planting density of 675 × 10⁴ grains/hm² has better population structure, while 825 × 10⁴ grains/hm² is more capable of obtaining high yield,and 675 × 10⁴ ~ 825× 10⁴ grains/hm² is more suitable for late sowing of winter wheat even sowing planting density.