The invention belongs to the technical field of material preparation and provides a high-bending-resistance glass coating liquid composition and a preparation method thereof. The coating liquid composition contains the following components in parts by weight: 50-100 parts of special silicon resin, 10-50 parts of a double-shell core-shell-structure nanoparticle, 2-6 parts of a photoinitiator and 100-600 parts of a diluted solvent, wherein the special silicon resin is a silane oligomer containing acryl acyloxy; and the double-shell core-shell-structure nanoparticle is one of nano-aluminum oxide,nano-zirconium oxide , nano-silicon oxide, nano-titanium dioxide and nano-zinc oxide, the particle size of the nanoparticle is 1nm-100nm, and the nanoparticle is prepared by virtue of a special preparation method. The coating liquid composition has excellent bending resistance, and the bending number of times can reach 10000; the coating liquid composition has extremely high surface hardness, andthe hardness can reach up to 7H-9H; and the coating liquid composition is extremely convenient to use and can be widely applied to the protection treatment of plastic surfaces in the field of flexible display.