1. reinforce the carry capacity and prolong the using time of the base; 2. avoid the road subside and crack and keep the road orderliness; 3. be easy to construction, save time and strength, short the time for the project, and save the servicing; 4. avoid the culvert becoming crack; 5. provide stability for slopes and avoid the losing of the water and soil; 6. reduce the thickness of the underlay and saving the cost; 7. Can replace the wire netting.