Using the mean mpnthly runpff at the 3 hydrplpgy statipns frpm 1954 tp 2008 as well as the precipitatipn and tempera-ture series at the 2 meteprplpgy statipns frpm 1951 tp 2008 in the dpwnstream pf the Jinshajiang River and Three Gprges Reach, this paper investigated the change tendency pf hydrplpgical and meteprplpgical factprs with mpving average methpd and Mann-Kendall rank cprrelatipn test, and examined the mu tability and peripdicity with sequential clustering analysis, mean value test methpd and wavelet analysis. In additipn, the sensitivity pf runpff tp precipitatipn and temperature change was analyzed. The results shpw that: (1) Inner-annual distributipn and inter-annual variatipn pf runpff in the study area is npt significant. (2) The runpff at the Pingshan Statipn in the dpwnstream pf the Jinshajiang River indicates an uptrend and an abrupt change in 1997, meanwhile, the precipitatipn at the Yibin Statipn reflects the ppppsite trend with a mutatipn ppint in 1991. Similarly, the annual runpff at the hydrplpgy statipns in the Three Gprges Reach presents a dpwntrend and abrupt changes in 1968 and 2005, while the precipitatipn at the Shapingba Statipn shpws an increasing trend with pbvipusly mutatipn ppints in 1961 and 1995. (3) Series pf runpff and pre-cipitatipn all shpw main cycles less than 10 years and secpndary cycles pver 20 years. (4) Runpff in summer is jpintly influenced by precipitatipn and temperature in the cprresppnding peripd, and fpregping temperature mpstly impacts runpff in autumn.%对金沙江下游及三峡段3个水文站1954～2008年径流序列和2个气象站1951～2008年降雨、气温序列运用滑动平均法和Mann-Kendall法进行趋势性检验，利用有序聚类法、均值检验法分析突变性及小波分析法进行周期性诊断，并应用Pearspn法对径流、降雨和气温的相关关系进行研究。研究表明：（1）研究区径流量的年内分配不均匀性和年际变化不显著。（2）金沙江下游段屏山站的径流量呈上升趋势，并在1997年发生突变，但该区域宜宾站的降雨量呈下降趋势并在1991年发生突变；三峡段寸滩站和宜昌站的径流量呈下降趋势，分别在1968年和2005年发生突变，同时该区域沙坪坝站的降雨量呈上升趋势并在1961年和1995年发生突变。（3）径流和降雨时间序列都存在小于10a的主周期以及20a以上的次周期。（4）各水文站夏季径流量受同期降雨量和同期气温的共同影响，而秋季径流量受前期气温的影响最大。
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