The invention relates to a preparation method of textiles, in particular to a production method of a down proof fabric. The production method of the down proof fabric sequentially includes the steps of selecting of a gray fabric, wherein the gray fabric is elastic tribute silk formed by cotton, polyester, bamboo fibers and spandex, the tribute silk is blended yarns formed by cotton fibers and the bamboo fibers in the warp direction, the cotton fibers account for 50-70%, the bamboo fibers account for 30-50%, and the tribute silk is low-elasticity network yarns and spandex core-spun yarns, sanding, rolling of wind-proof agents, wherein the vehicle speed is 60-80m/min when the wind-proof agents are rolled, specifically, the fabric after sanding processing is placed into a wind-proof agent solution at the temperature of 40-55 DEG C, the liquor detention rate is 45-65%, the wind-proof agents comprise starch composite catalysts and compounds, and the compounds are formed by compositing acrylic acid amide compounds and hydrophilia softening agents KF-896 according to the mass ratio of 2-5:1, calendaring, wherein the calendaring temperature is controlled to be at 105-115DEG C, and the vehicle speed is 30-50m/min, preshrinking and after-finishing. The down proof fabric prepared in the method has excellent air permeability and the effect of preventing down from coming out.