Abstract: Qi 5 you 661 is a new variety of hybrid rice bred by the combination of sterile line Qi 5A and restorer line Fuhui 661 in Rice Research Institute of Fujian Academy of Agricultural Sciences. This combination was characterized by regular population, strong tillering ability, good color turning in mature period, high seed setting percentage, high yield, excellent rice quality and good comprehensive resistance, etc. It has been examined and approved by Fujian Crop Variety Approval Committee (No.20200048) in 2020. The demonstration performance of Qi 5 you 661 in the plot experiment of late rice in Fujian Province from 2018 to 2019 was introduced in this paper, and the high-yield cultivation technology and seed production technology of Qi 5 you 661 were summarized from the aspects of timely sowing, rational close planting, fertilizer and water management, pest control, regulation of flowering stage and isolation measures, so as to promote the popularization and application of this variety in Fujian Province.