Aimed at the problems that the factors of the antierosion capacity influences on the airport ecological slope protection vegetationat the initial stage of growth, this paper performs a direct shear test and antierosion test on the turf of different planting density and protection modes, and obtains an equation on the numbers of plant and the soil cohesion increment in different ecological protection modes. On the basis of laboratory experiments, the antierosion velocity and erosion damage modes are investigated. The influence laws of different planting density and protection modes on slope erosion are analyzed. In addition, the relationship between soil cohesion and turf soil impact velocity is explored, and the conditions and methods of the engineering applicationare given.