To evaluate the response of the grain yield and quality of double-cropped high-quality rice cultivars to climate warming,a free-air temperature increase experiment was conducted with Jinzao47 (Inbred Indica rice) and Liangyou287 (Hybrid Indica rice) as early rice cultivars,and Xiangyaxiangzhen (Inbred Indica rice),Wanxiangyouhuazhan (Hybrid Indica rice) and Yongyou5550 (Indica-Japonica Hybrid rice) as late rice cultivars. The results showed that post-anthesis warming with a canopy temperature increase of 1. 29℃ and 1. 73℃ in the early and late rice growing seasons respectively,had no significant effects on the grain yield of both early and late rice. Post-anthesis warming had no significant effects on the milling quality and chalky grain rate of early rice,but increased the chalkiness by an average of 16. 0%. The brown rice rate,head rice rate,chalky grain rate,and chalkiness of late rice were increased by an average of 1. 8%,3. 5%,30. 3%,and 27. 2%,respectively. Protein content was increased by an average of 6. 27% for both early and late rice under warming,whereas amylose content decreased by 3. 53%,with an increase of 0. 09mum in the average diameter of starch granules. The rice flour RVA characteristics showed a large variation with growing seasons and cultivars under post-anthesis warming. In conclusion,post-anthesis warming had no significant effects on the grain yield of double-cropped high-quality rice cultivars,while benefiting the milling and nutritional quality of rice grains but with a deterioration in the appearance quality. These results shed light on the production of the double-cropped rice for both high quality and high yield in face of climate warming.