Abstract: 1158 landslides induced by rainfall during the period of 1973 to 2002 in Jiangxi Province are analyzed from the terms of lithology and slope aspect. And the relationship between probability of the rainfall-induced landslides and rainfall is analyzed statistically. It is concluded that: (1) Landslides in Jiangxi Province occurred mostly in 1998 and 2002, or in May to October, especially in June; (2) About 64 % landslides occurred on the slope face to South, but the rainfall influence to the landslide with different slope aspect is almost the same. And the only difference is that the landslides face to North need about 3 % more excitation or effective rainfall than the landslides face to South; (3) 6 days accumulative rainfall ,14 days effective rainfall(the coefficient of the effective rainfall =0.82), 3 days accumulative rainfall and 9 days accumulative rainfall is the most relative kind of rainfall respectively to the landslides in metamorphite, magmatite, carbonatite and fragmentary rock;(4)The lagged time of landslides is discussed based on the classification of different lithology . (4) About 80 % landslide occurred just on the storm day ,and 12 %－14 % landslides occurred in metamorphite, magmatite and fragmental rock after the storm, about 22 % landslides occurred in carbonatite after the storm. And the lagged time is almost 1 to 3 days; the landslides in carbonatite have relative shorter lagged time than the others, which is due to the penetrability of the slides, degree and speed of rock and soil strength weakening.

Key words: landslide, rainfall, effective rainfall, slope aspect, lagged time of landslides