Abstract: Canopy distribution of precipitation and its controlling factors in two deciduous broad-leaved forests were measured and analyzed during the growing season in 1996. For the Quercus liaotungensis forest, the stemflow, throughfall, interception were 66.7mm, 539.9mm and 117.6mm,amounting to 9.2% ,74.5% and 16.3% of the precipitation of 723.6mm,respectively. For the deciduous broad-leaved mixed forest, the stemflow, throughfall and interception were 32.8mm(4.5%) ,555.9mm (76.8%) and 134.9(18.6%),respectively. The stemflow was positively related to the total precipitation and precipitation during the initial 24 hours ,while throughfall was positively related to the precipitation and maximum rainfall density.