利用2007 年以来川滇地区24 次中小型破坏性地震(MS4． 7 ～ 6． 7)的基岩场地和土层场地的强震动记录，分别统计获得了川滇地区水平向基岩场地和土层场地的地震动峰值及加速度反应谱衰减关系。通过与俞言祥等2006 年基于转换方法得到的我国西部基岩地震动衰减关系的对比，验证了本文衰减关系对利用中小地震进行地震动估计的可靠性。同时，根据强震动数据随震级以及震中距的分布，分析了本文结果的适用性和可靠性。

The ground motion attenuation model for PGA，PGV and response spectrum at rock sites and soils sites are derived separately from the digital strong motion records of moderate earthquakes in the Sichuan-Yunnan region after 2007． By comparison with Yu Yanxiang' s attenuation model for rock sites in Western China，reliability of the model is verified for moderate earthquakes． According to the distribution of strong motion data with earthquake magnitude and epicentral distance，the applicability and reliability of the results in this paper is discussed．

中国地震局地壳应力研究所基本科研业务专项( ZDJ2013-04 ) 和国家自然科学基金资助项目(51278469)联合资助