[Objective] The paper aims to discuss the influence of canopy rainfall penetration

canopy interception and trunk runoff on rainfall redistribution in the mountainous hilly forest of Northern Hebei Province

and provide a basis for forest construction and forest structure adjustment in this area.[Methods] The correlation analysis and regression analysis of forest rainfall data were conducted on SPSS.[Results] The penetrating rain accounted for the largest proportion

accounting for 70.22% of the total. The canopy interception accounted for 28.20% while the trunk runoff accounted for 1.58% (R2=0.997 9)

there was no rain through the forest when the rainfall was relatively small. And when the rainfall outside the forest reached 0.78 mm

penetration occurs. Canopy interception played a very important role in the redistribution of rainfall. There was a significant power function relationship between canopy interception and rainfall outside the forest (p<0.01). There was a positive correlation between trunk runoff and rainfall outside the forest (R2=0.9703). When the rainfall reached 4.88 mm

the trunk runoff occurred in the broad-leaved forest

but the trunk runoff had a time lag

which was closely related to the forest itself and the intensity of rainfall. When the leaf area index is small

and the angle between branches is about 45%

the bark surface was smooth

trunk runoff was relatively easy to occur.[Conclusion] The forest canopy had an important influence on the redistribution of rainfall. The hydrological effects of the canopy of broad-leaved forest in northern Hebei Province were related to the forest health development.