Abstract: The R language GGE-biplot double plot software was used to map the fresh sweetpotato yield data of the regional test of the national sweetpotato variety North potato area from 2008 to 2009, and analyze the high and stable yield and adaptability of the tested variety Zhenghong 22. The results showed that the vertical foot of Zhenghong 22 was closer to the positive direction on the average environmental axis, and the high-yield performance was better and higher than that of the control. The axis perpendicular to the average environmental axis closer to the average environmental axis, and the stable yield performance was better, which was higher than that of the control. The position in the sector of the adaptive function map was close to the origin of the coordinate axis, and the adaptability was second only to the control Xushu 18, indicating that Zhenghong 22 was an excellent variety with popularization value in sweetpotato production.