Abstract: A new variety of sweet potato, Longshu 31, was bred from Longshu 9 at Longyan Institute of Agricultural Sciences, Longyan, Fujian. In the National Southern Sweet Potato Regional Test and Fujian Provincial Sweet Potato Regional Test, the new breed showed significantly higher fresh tuber yield, dry matters and starch compared with Guangshu87 and Jinshan 57, as well as desirable sensory quality, appearance, shelf-life and disease resistance. The variety has been nationally registered and certified in 2016.