In order to understand the effect of late sowing on the production performance of oats, and screen late sowing varieties suitable for western Henan, 12 oat varieties were selected and sown in late November, and randomized block design was used to investigate phenological period, basic seedlings, tillering, plant height, yield, dry-fresh ratio, leaf-stem ratio and other data. The results showed that the growth period was 180-196 d, with ‘Qinghai 444’ being the shortest. The average seedling emergence period was 23 days, 10 varieties showed an increase in basic seedlings at regreening stage, which was analyzed as uneven emergence caused by low temperature. At regreening stage, the basic seedlings were 1.758-2.967 million plants/hm², with ‘Temu’ being the highest. There were no tillers before overwintering, and 1.85-2.5 tillers per plant at regreening stage, with ‘Tianyan No.3’ having the most tillers. The plant height was 135.0-164.5 cm, and ‘Temu’ was the highest. The leaf-stem ratio was 0.285-0.344, and ‘Beiley’ was the highest. The dry-fresh ratio was 0.238-0.301, with ‘Temu’ being the highest. The fresh grass yield was 38382.1-53216.2 kg/hm², and ‘Tianyan 70’ was the highest. The hay yield was 10683.4-13643.8 kg/hm², with ‘Temu’ being the highest. The results of grey correlation analysis showed that ‘Tianyan 70’ and ‘Temu’ ranked first and second respectively in the comprehensive performance evaluation. In production, it is recommended that ‘Tianyan 70’ and ‘Temu’ are suitable varieties for late sowing in western Henan, and the seeding rate should be increased when late sowing.