[Objective] Rainfall distribution characteristics of broad leaved forest in typical karst area were studied for considering contribution to soil and water conservation and forest ecological function analyze in karst area.[Methods] The rainfall distribution characteristics of broad leaved forest in Guizhou karst area were studied using the method of in situ observation. During the observation period

there were 25 rainfall recorded

and most of them were light or moderate rain.[Results] During the observation period

the total rainfall was 208.25 mm

the total amount of stem flow was 21.83 mm

which accounted for 10.48% of the total rainfall

and the variation range was 0~14.3%. Penetrating rain was 186.89 mm

which accounted for 89.7% of the total rainfall. The total amount of shrub layer interception was 34.86 mm

accounted for 16.74% of total rainfall. Canopy interception amount was 22.58 mm

which accounted for 10.84% of rainfall. When the rainfall was more than 1.15 mm in the study area

the stem flow occured and showed well positive linear correlation with rainfall. The shrub interception amount increased with the rainfall

but there was no significant linear correlation between the canopy interception rates and rainfall.[Conclusion] In general

broad leaved forest in karst area has a strong interception and redistribution effects on the rainfall

which can effectively influence the regional water balance and soil erosion.