The utility model relates to a sash window glissading material technique. the top width of a lead rail of the glissading material is 4mm to 8mm; a wool top groove is arranged between two adjacent window leaf bottom rails of the corresponding window leaves; a wool top groove is also arranged between the adjacent leaf bottom rails of the corresponding window leaves and the window screen bottom rail; a sealed wool top is arranged on the wool top groove. By improving the existing technique, the utility model greatly improves the stability of the movement of the window, greatly reduces the fricative caused by the movement, and increasing the water tightness and air tightness from grade two to grade four.