Double roller blind, also known as soft gauze curtain, rainbow curtain, Doris, dimming roller shutter, double-layer roller shade. A kind of textile woven by a small piece of fabric with equal width and gauze at intervals from each other, which is fixed by one end, and the other end is rolled with the shaft to reach the goal of adjusting the light. When gauze and gauze overlap, the time line is relatively soft, to some extent, the direct light is reduced. When the cord fabric and the cord fabric are recombined, the light is completely covered, thus finally achieving the purpose of blocking the light. When the curtain needs to be completely opened, the curtain can be completely rolled up. Double roller blind combines the warmth of fabric, the simplicity of roller shutter, and the dimming function of Venetian blind. The curtain is easy to operate, diversified shading forms, and does not hinder the vision at all. It is an ideal choice for office and home tracery.