An ink-jet ink for color filter comprising 10 to 50 parts by weight of aqueous nano pigment dispersion and 51 to 95 parts by weight of a cold curing component, wherein: the cold curing component comprises 40 to 80 parts by weight of an acrylic ester emulsion containing a first cold curing component and 1 to 20 parts by weight of a second cold curing component, wherein the first cold curing component comprises an active carbonyl group, and the second cold curing component comprises a hydrazide; or the first cold curing component comprises an acetoacetyloxy group, and the second cold curing component comprises a polyamine, and wherein the ink-jet ink for color filter was prepared by: mixing 5 wt% to 40 wt% of styrene, 1 wt% to 30 wt% of a (meth)acrylic ester monomer, 0.5 wt% to 5 wt% of an acidic monomer, 0.25 wt% to 5 wt% of a cross-linking monomer, 0.05 wt% to 0.5 wt% of an emulsifier adjuvant, and 0.05 wt% to 0.5 wt% of an oil soluble initiator so as to form a mixture, and adding 0.5 wt% to 10 wt% of an organic pigment or dye, and optionally 0.05 wt% to 0.5% of a nucleating promoter to the mixture to obtain an oil phase solution after being dissolved; dissolving 0.05 wt% to 2 wt% of an emulsifier and 0.05 wt% to 2 wt% of buffering agent to 40 wt% to 90 wt% of deionized water to obtain an aqueous phase solution; mixing the oil phase solution with the aqueous phase solution to obtain a fine emulsion after agitation and homogenization; heating the fine emulsion to an reaction temperature, adding 0.05 wt% to 0.5 wt% of a water soluble initiator to initiate polymerization, after the polymerization adjusting pH value to 9∼10 with aqueous ammonia, and obtaining an aqueous nano pigment dispersion by filtration; and adding a cold curing component to the aqueous nano pigment dispersion, and mixing evenly to obtain the ink-jet ink for color filter. the cold curing component comprises 40 to 80 parts by weight of an acrylic ester emulsion containing a first cold curing component and 1 to 20 parts by weight of a second cold curing component, wherein the first cold curing component comprises an active carbonyl group, and the second cold curing component comprises a hydrazide; or the first cold curing component comprises an acetoacetyloxy group, and the second cold curing component comprises a polyamine, and wherein the ink-jet ink for color filter was prepared by: mixing 5 wt% to 40 wt% of styrene, 1 wt% to 30 wt% of a (meth)acrylic ester monomer, 0.5 wt% to 5 wt% of an acidic monomer, 0.25 wt% to 5 wt% of a cross-linking monomer, 0.05 wt% to 0.5 wt% of an emulsifier adjuvant, and 0.05 wt% to 0.5 wt% of an oil soluble initiator so as to form a mixture, and adding 0.5 wt% to 10 wt% of an organic pigment or dye, and optionally 0.05 wt% to 0.5% of a nucleating promoter to the mixture to obtain an oil phase solution after being dissolved; dissolving 0.05 wt% to 2 wt% of an emulsifier and 0.05 wt% to 2 wt% of buffering agent to 40 wt% to 90 wt% of deionized water to obtain an aqueous phase solution; mixing the oil phase solution with the aqueous phase solution to obtain a fine emulsion after agitation and homogenization; heating the fine emulsion to an reaction temperature, adding 0.05 wt% to 0.5 wt% of a water soluble initiator to initiate polymerization, after the polymerization adjusting pH value to 9∼10 with aqueous ammonia, and obtaining an aqueous nano pigment dispersion by filtration; and adding a cold curing component to the aqueous nano pigment dispersion, and mixing evenly to obtain the ink-jet ink for color filter. mixing 5 wt% to 40 wt% of styrene, 1 wt% to 30 wt% of a (meth)acrylic ester monomer, 0.5 wt% to 5 wt% of an acidic monomer, 0.25 wt% to 5 wt% of a cross-linking monomer, 0.05 wt% to 0.5 wt% of an emulsifier adjuvant, and 0.05 wt% to 0.5 wt% of an oil soluble initiator so as to form a mixture, and adding 0.5 wt% to 10 wt% of an organic pigment or dye, and optionally 0.05 wt% to 0.5% of a nucleating promoter to the mixture to obtain an oil phase solution after being dissolved; dissolving 0.05 wt% to 2 wt% of an emulsifier and 0.05 wt% to 2 wt% of buffering agent to 40 wt% to 90 wt% of deionized water to obtain an aqueous phase solution; mixing the oil phase solution with the aqueous phase solution to obtain a fine emulsion after agitation and homogenization; heating the fine emulsion to an reaction temperature, adding 0.05 wt% to 0.5 wt% of a water soluble initiator to initiate polymerization, after the polymerization adjusting pH value to 9∼10 with aqueous ammonia, and obtaining an aqueous nano pigment dispersion by filtration; and adding a cold curing component to the aqueous nano pigment dispersion, and mixing evenly to obtain the ink-jet ink for color filter.