Abstract: This paper used GGE-biplot based on R language to analyze high-yield, stability and adaptability of maize yield, with ten new maize hybrid combinations planted in five ecological conditions of high altitude in Garze Tibetan Autonomous Prefecture, Sichuan Province, to provide references for identification of new varieties and maize high-yield production. Meanwhile, representativeness and discrimination of five different testing sites was analyzed. The results showed that, ‘Kangyushi 0903’ and CH327 were both the combination with a high and stable yield, and SZ694 had a relatively high yield also, but its stability was a bit poor, so it had a special adaptability in Hailuogou. In terms of discrimination and representativeness, Jiulong, Hailuogou and Danba had a better performance: Hailuogou and Danba had the best discrimination, while Danba site had the best representativeness.