Low-density ultrathin flame-retardant sunshade fabric

The utility model provides a low-density ultrathin flame-retardant sun-shading fabric which comprises a base cloth layer and a flame-retardant coating which are arranged in sequence, the base cloth layer is formed by interweaving warp yarns and weft yarns in an eight/five-fly weft face reinforced satin weave structure, the warp yarns are glass fiber yarns with the fineness of 50D-75D, the weft yarns are glass fiber yarns with the fineness of 40D-60D, and the flame-retardant coating is arranged between the warp yarns and the weft yarns. Each glass fiber yarn comprises a glass fiber rough yarn and a glass fiber fine yarn spirally wound on the surface of the glass fiber rough yarn, the line diameter of the glass fiber rough yarn is 6-8 times of the line diameter of the glass fiber fine yarn, the line diameter of the glass fiber fine yarn is not larger than 8 microns, each glass fiber rough yarn and each glass fiber fine yarn are twisted and are opposite in twisting direction, and the surface of the base cloth la