The invention relates to water-based resin-free pigment printing paste and provides pigment printing paste applicable to coloring of water-based leather coatings and pigment printing of pure cotton, polyester cotton and blended fabric. The water-based resin-free pigment printing paste comprises the following components by weight: 2 to 20 percent of wetting agent, 1 to 20 percent of dispersing agent, 1 to 10 percent of stabilizing agent, 25 to 70 percent of pigment and the balance of deionized water, wherein the wetting agent is one of dibasic alcohol or condensed poly diols; the dispersing agent comprises one or more of sodium salt or ammonium salt of an acrylic copolymer and a multi-anchor multi-chain macromolecular polymer; the stabilizing agent comprises one or more of a low-toxicity anti-corrosion bactericide, a defoaming agent and an anti-settling agent. The water-based resin-free pigment printing paste is applicable to coloring of leather coatings and pigment printing of pure cotton, polyester cotton and blended fabric, and is wide in application range; a paint film has high water resistance and high dyeing rate.