A pigment ink jet printing pretreatment agent

The present invention discloses a pigment ink for inkjet printing the pretreatment agent, which comprises by weight percent the following components: 10 to 50% cationic compound; 5-15% softener; 0.05 to 1.50% defoamer; Deionized water 33.50 ~ 84.95%. Take the above-described cationic compound in parts by mass of deionized water, stir, added dropwise with stirring an appropriate amount of softening agents, defoamers, followed by sufficient mixing to obtain a pigment ink for inkjet printing pretreatment agent. Using the above-mentioned pretreatment agent for the fabric using conventional singeing, desizing, scouring, bleaching or mercerizing process pretreated and dried, and then the pigment ink jet printing, hot air drying after curing was 160 ℃ 2min. After the pretreatment agent of the present invention is obtained treated product fabric color yield significantly improved brightness and color.