Road construction: improve the stress condition of pavement and road base to reduce rutting; Maintain the stability of the road base and natural soil components: reduce or do not use the filter sand layer: the maintenance cost of the road will be greatly reduced due to the reduction of pavement cracks and ruts. Support of retaining wall and slope: high strength geotextile can be used to build retaining wall and slope: keep soil, prevent soil erosion and soil loss; Strengthen the bearing capacity of slope embankment. Drainage: it can prevent the groundwater level from rising; Prevent water from penetrating into the building, and play a very good role in reverse filtering: reduce or eliminate the water pressure in the capillary hole. Construction of railway subgrade: when the train passes by, strong suction will occur in the subgrade, which will lead to soil erosion to the gravel road base and endanger the stability of the subgrade. Geotextile can avoid this. Construction of Aircraft Taxiway: improve the stress condition of pavement and road base, reduce or do not use filter sand layer, greatly reduce the project cost and shorten the construction period.