The stone filling rate and the strength index of individual structure for gabion net are the key indexes in ecological revetment technology of gabion net cushion. Through indoor filling rate test of gabion net, the correlation between the minimum dry density and grain size gradation of rockfill is studied, and the rockfill gradation curve of single structure for gabion net is determined in large-scale direct shear test. Using NHRI-4000 high performance direct shear apparatus with large contact surface, the shearing comparison tests of rockfill are carried out, with or without a gabion net under the same particle size and shear conditions. The test results show that the filling rate of gabion net increases with the increase of inferior diameter particles content. When the P<40 content is 60%, combined with certain compaction measures, the crushed stones in gabion net can reach the best filling effect (the filling rate is 72%), which meets the design requirements for revetment projects. The gabion net structure is a composite composed of rockfill and gabion net. The shear strength of rockfill with gabion net is much greater than that of rockfill without gabion net. The elastic modulus of gabion net is much higher than that of the rockfill. The "hoop" effect of gabion net restricts particles movement and increases the overall stability of rockfill. In terms of deformation characteristics, except for the overall ductility of gabion structure, its strain softening and hardening are basically consistent with the deformation characteristics of general coarse-grained soil.