The invention discloses a quick-cold-water-soluble embroidery bottom liner film with excellent weatherability and a preparation method thereof. The bottom liner film is prepared from, by mass, polyvinyl alcohol masterbatch 15-25%, a starch component 0.7-2.0%, a plasticizing component 2.5-5%, a coalescing agent 0.8-2.0%, a defoaming agent 0.3-1.0%, a strengthening agent 0.1-5% and the balance a solvent. The quick-cold-water-soluble embroidery bottom liner film can be used under the condition of 20%-80% humidity, the weatherability is greatly improved, and the use cost is reduced. In addition, the water solubility of the quick-cold-water-soluble embroidery bottom liner film is more excellent than those of existing products in the market, thorough dissolution without residues can be achieved in normal-temperature water within 30 seconds on the aspect of water solubility, the water solubility is doubled compared with those of existing products, and the quick-cold-water-soluble embroidery bottom liner film is a real quick-cold-water-soluble film.