Ink-jet ink and application thereof

The invention discloses ink-jet ink and application thereof.The ink-jet ink is prepared from, by mass, 3.0%-25.0% of organic dye, 1.0%-2.0% of a surfactant, 0.1%-1.0% of a color fixing agent, 10.0%-20.0% of humectant, 1.0%-10.0% of alkali, 0.1%-0.5% of an antibacterial agent and the balance deionized water, wherein the pH is 7.0-8.0.The ink-jet ink is applied to cellulosic fiber inkjet printing, and a fabric can be directly printed without being starched; the printing fluency is good, the color fastness rate is high, the ink storage stability is good, and wastewater is easy to treat.