Biaxial ariented plastic weld grid is made by selecting excellent PP raw materials and adding UV stabilizer and antioxidant with the characteristic of high rupture-resistant strength, jointing fastness,low elongation,anti-corrosion,anti-ageing etc. Three kinds of impedance function when imbedded soil The surface pattern and friction function of the land; " inlaying the lock " function on the soil of grid net; Passive impedance function of the grid oneself.