1. Protect earth protect earth from being eroded by winds and rains before grass growing up. 2. Keep grass keep grass seeds distributed in slope firmly, and avoid to be washed. 3.Absorb thermal absoro thermal energy abundantly, increase ground wet, promote seed sprout, and prolong growth term of plants 4, Plants can form composite protection layer and endure wash with high water and fast speed. 5. Replace ong-lasting replace long-lasting slope protecion materials such as concrete, pitch, block etc, and can be used in slope protection such as road. railway, river, dam. mountain slope. etc.