Using rain recorder and filter paper stain method, the effects of evergreen broad-leaved forest on raindrop kinetic energy of Mopan Mountainin Yunnan Plateau were explored, during the period from May to Sep in 2016 and 2017. The results showed that the number of raindrops was more than troughfall raindrop by 61.7%. With the increase of rainfall, the raindrop diameter increased gradually. Raindrops with diameter <0.5 mm of outside of forest accounted for 40.85% of total number of raindrop in the light rain condition, while the proportion was only 12.22%, and the number of raindrop with 0.5~3.5 mm diameter accounted for a larger proportion than outside forest. When raindrop diameter >4.5 mm in outside forest, the raindrop terminal velocity stabilized around 9.34 m/s. When raindrop diameter >4.1 mm, the speed was about 7.05 m/s. Rain kinetic energy at the rainstorm condition was larger than it in light rainfall by 98.29%.and with the increase of rainfall, the peak in cumulative raindrop kinetic energy reached 20.68% rainfall outside of the forest. With the increase of raindrop diameter, the throughfall potential energy, total rainfall potential energy and canopy interception potential energy both showed a gradual increase trend. The buffering potential energy was 46.59% larger than that of penetrating rain potential, accounting for 65.18% of the total potential energy. The canopy layer has the function of retention and increase of raindrop, which also cause the rainfall lag in forest, and the had obvious buffering effect on the rainfall speed, potential energy and kinetic energy of natural rainfall.