Abstract: Based on ecological slope protection models through orthogonal tests,the comparative analysis of effects of slope protection is conducted by considering the types of geomat,density of grass seeds,types of soil,and slope gradient on erosion modulus.Shear strength of surface slope soil,permeability coefficient,and the sequencing sensibilities of influential factors are presented.Furthermore,the optimum combination considering various factors is obtained with a general weighted scoring method.Results show that the optimum effect for general consideration on erosion modulus,soil shear strength,and permeability coefficient can be achieved when using the slope gradient of 1∶ 1.5,EM4 3D geomat,silty clay,and the maximum density of grass seeds.