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．