Abstract: 【Objective】 Evaluate the high yield, stable yield, and ecological adaptability of new varieties of tartary buckwheat. 【Methods】 Through the analysis of experimental data from 5 varieties (lines) in 6 counties (districts), By combining the AMMI model with the GGE-Blilot software package of R language, principal component analysis was conducted on sweet buckwheat varieties from different climate zones in the southern mountainous areas of Ningxia for multiple years and the stability, adaptability, pilot representativeness were comprehensively evaluated. 【Results】 The buckwheat pilot area represented by Xiji County or Yuanzhou District in semi-arid areas and Haiyuan County in semi-arid areas prone to drought, and Yanchi County in the central arid zone was better. The new varieties of Guqiao 1 and Guqiao 3 had the best yield, stability, and ecological adaptability. 【Conclusion】 By combining the AMMI model analysis with production practice verification, the method is feasible, the results are reliable, and the validation is good.