A yang angle line shell nosing strip is made of alloy or engineering plastic, the bottom plate is arranged with a plurality of antiskid teeth or porous pattern which is conductive to combine with the wall and ceramic tile, one side of the bottom plate is made into sector arc surface, the edge of the sector arc surface is arranged with a position limiting hypotenuse which is used to limit the installation position of the ceramic tiles or stone materials. When the utility model is installed and used, the cement is firstly pasted on one side of the yang angle line of wall and the sector arc surface is installed to direct outwards, then the ceramic tiles are paved besides the two sides of the sector arc surface and cling to the position limiting hypotenuse on the sector arc surface. Due to the sector arc surface of the yang angle line shell nosing strip which can oppositely connect with the interfaces of the ceramic tiles or stone materials on the yang angle line, the decoration effect is particularly good and the installation is simple and convenient.