The invention provides a method for weaving a high-count and high-density home textile fabric and a method for aftertreatment thereof and relates to the field of spinning. The high-count and high-density home textile fabric is made of pima cotton, warp and weft each are 100 pieces of double strand yarn, the warp direction density is 200 pieces/inch, the weft direction density is 100 pieces/inch, and the fabric weave is satin weave. The best pima cotton among the cotton is utilized to weave 100 pieces of yarn, the all spinning double strand yarn is utilized to weave the fabric unique in style, and the fabric has more excellent elasticity, wrinkle resistance, draping, breathability, anti-pilling performance and dimensional stability and the like than a conventional product. The finished product produced by the process for production and aftertreatment of the high-count and high-density home textile fabric has smooth surface and is gentle in color, soft in touch, good in moisture absorption and breathability, unique in appearance, good in skin friendliness, drapability and abrasion resistance, comfortable to use, bright in color and stiff and smooth in texture.