Using stearic acid silane or other modified glass fiber powder surface treated, it has greater surface activity, better compatibility and crosslinking properties, with a variety of resin material wear resistance, compressive, shear and torsion xingeng, better performance. The modified glass fiber powder is mainly used for glass fiber reinforced plastic filling material. Modified silane treatment of glass fiber powder for the construction of the external wall insulation, interior wall decoration, interior wall, such as moisture-proof fire. The activity of silane treated glass fiber powder strong toughness, good tensile strength; alkali resistance, resistance to temperature and humidity changes outstanding ability; cracking resistance, excellent impermeability; elastic modulus, impact resistance, high tensile strength, bending strength.