Abstract:The content of active polysaccharides，triterpenoids，mineral elements （Zn，Fe，K，and P），proteins，and 18 amino acids in seed kernels of Acer truncatum cultivated in three production areas were compared and analyzed，and the nutritional value of proteins was evaluated.The results showed that the fruit wing length and 100-grain weight of see kernels of A.truncatum from Beijing Jiulong Mountain and Wengniuteqi Pine Forest Farm in Chifeng，Mongolia were significantly higher than those from Yangling Agricultural High-tech Demonstration Zone in Shaanxi，with 12.64%-15.71%higher wing length，and 14.15%-17.94%higher 100-grain weight.The seed kernels of A.truncatum cultivated in the three producing areas were rich in Zn，Fe，K，and P，where there were significant differences in Fe and K content between the three producing areas，and no significant difference in Zn and P content was found between the three producing areas.The seed kernels from the three producing areas all contain high content of proteins and eight essential amino acids necessary for the human body.According to the essential amino acid index （EAAI），the seed kernels of A.truncatum from Beijing Jiulongshan and Chifeng，Inner Mongolia were high-quality protein sources，with EAAI＞95，and those from Yangling，Shaanxi were good sources of proteins，with 86＜EAAI≤95.In addition，the seed kernels of A.truncatum from the three producing areas contained highly active polysaccharides（1.04%-1.58%）and triterpenoids（20.75%-21.22%）.In summary，the seed kernels of A.truncatum from the three production areas were rich in mineral elements，polysaccharides，and triterpenoids，and reached the ideal protein source standard，indicating high nutritional value and potential medicinal value.An in-depth study is needed for the investigation of key components and mechanism of action.