Printing paste, and preparation method and application thereof

The invention relates to the technical field of printing of cellulose fiber fabrics, and discloses printing paste, a preparation method for the printing paste and the application of the printing paste to a cellulose fiber printing process. The printing paste consists of the following components in percentage by weight: 0.01 to 4 percent of reactive dye, 30 to 50 percent of polyacrylic acid thickener stock paste, 1 to 3 percent of sodium hydrogen carbonate, 0.25 to 0.75 percent of rare earth chloride and the balance being water. According to the printing paste, and the preparation method and application thereof, the rare earth chloride is particularly added into the formula of the printing paste, so that the dye up-take of the reactive dye on fibers is improved under the complexing action of fibers, rare earth and the reactive dye, and the fixation rate and dye yield of the reactive dye on the fibers are improved; the advantages of high color yield, high rheological property, low cost and the like can be achieved.