Geomat is a three-layer network structure used to fix soil and grow grass. The structure retains 90% of the space and can be filled with soil, gravel and small stones to help the roots of plants pass through, and the soil surface and plants can be firmly combined. Generally, plant roots can reach a depth of 30-40cm below the surface, so the combination forms a solid green composite protective layer, which can withstand high-level and high-speed water erosion.