In order to stagger the harvesting time of day-lily and critical busy farming time on summer in the producing region of Qingyang areas, a new variety of late-maturing‘day-lily Jinlei No.1’was bred systematically. The new variety has good agronomic traits and strong resistance, ripening time of which is more than 10 days late, the harvest time postponed for 5 days and the yield increased by 3.4% and 5.2%, respectively, compared with Malianday-lily and Xian day-lily. This avoids heavy losses due to farmers too busy in harvesting summer grain to harvest day-lily timely.