Greening protection slope of expressway roadbed

The utility model discloses a greening slope protection of an expressway roadbed, which relates to the technical field of greening slope protection, and comprises a slope body, the bottom ends of the two sides of the slope body are both provided with second water channels, the two sides of the slope body are both provided with nutrient soil layers, one end of each nutrient soil layer is provided with a soil-proof layer, and one end of each soil-proof layer is provided with a plurality of planting grooves. Green plants are arranged in the planting grooves, a gravel layer is arranged at the top end of the slope body, a leveling sand layer is arranged at the top end of the gravel layer, and a roadbed body is arranged at the top end of the leveling sand layer. By means of the water drainage pipe, water in the first water channel can be effectively prevented from being directly drained into green plants and can be drained through the water drainage holes in the bottom end of the water drainage pipe, so that the gr