In this study, Japan's multifunctional materials company was used to provide the phytosanitary materials jointly developed by Yamaguchi University, and the red soil of the National Pingtung University of Science and Technology Soil and Water Conservation Experimental Zone was used as the experimental soil matrix to test the density and slope of different paving under the rainfall simulating test. The analysis found that used the multifunctional planting net can effectively reduce runoff and soil loss. The steeper the slope, the more runoff and soil loss it produces. Multifunctional planting nets with higher density can reduce the effect of runoff and soil loss, but the statistical difference is not significant.