Because the significance of the Adolescent Bone Age Characteristics(ABAC)for the de-velopmental assessment and Endurance Athletes Primary Selection(EAPS),this paper adopts the methods of measurement,literature,statistics and survey to study the ABAC and EAPS in plateau region. The findings indicate that:the bone developed normally ratio was 54. 70% ,the early matu-rity ratio was 7. 10% ,late - maturing ratio was 38. 20% . The results revealed that there are differ-ences of bone age in units and whether the only - child except sex and nations in the 0. 05 significant level. Because the particularity of the high late - maturing ratio(mean age difference = - 0. 742 ), the standards of ABAC should be reference for national standards(age difference absolute value≥2)and base on the new standard(≤ - 2. 5 or age difference > 1. 0 )in Yunnan Province.%1）高原地区青少年骨骼发育晚熟比率大于早熟比率，正常比率为54.70%，晚熟比率为38.20%，早熟比例为7.10%。2）高原地区青少年发育不同指标的差异分析表明，在0.05差异显著性水平下，不同单位的龄差存在差异，是否独生子女的龄差存在差异，不同性别的龄差不存在差异，不同民族的龄差不存在差异。3）鉴于高原地区因遗传或特殊环境造成的青少年整体发育相对较为（晚）（龄差均值=-0.742）特殊性，就高原地区青少年耐力性运动员初级选材而言，其龄差标准应在参考国家标准（龄差绝对值≥2）的基础上，以新标准（龄差≤-2.5或龄差>1.0）为主。
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