The invention belongs to the field of building materials and particularly relates to a slope protection project bag. The slope protection project bag comprises a net-shaped bag body formed by sewing upper cloth and lower cloth. Grass seeds are attached into the surface of the net-shaped bag body. An iron wire is arranged at the opening position of the net-shaped bag body and bent into an annular shape. An HDPE film is bonded to the outer surface of the net-shaped bag body. Linkage buckles are arranged at the four corners of an ecological bag. The front face and the reverse face of the ecological bag are each provided with four rhombic thorns at the ends of the ecological bag. The connection lines of the four thorns on the front face and the connection lines of the four thorns on the reverse face are perpendicular and the thorns are symmetrical. The slope protection project bag has the beneficial effects of being resistant to ultraviolet rays, resistant to aging, free of toxin, free of combustion supporting and free of extending of cracks, and zero pollution is truly achieved; and the linkage buckles are used for enhancing the tensile strength and lion-loaded shear strength of an ecological flexible slope protection system, good heat resistance and cold resistance are achieved, chemical stability is good, rigidity and toughness are high, and mechanical strength is good.