The invention discloses digital printing pulp, which is prepared from the following components in parts by weight: 2 to 10 parts of thickening agent, 2 to 8 parts of viscosity regulator, 1 to 6 parts of antibacterial agent, 1 to 5 parts of antioxidant, 1 to 5 parts of color fixing agent and 80 to 100 parts of water. A colloid solution can be formed by the thickening agent, the viscosity regulator and the water; the antibacterial agent, the antioxidant and the color fixing agent are added into the colloid solution; the antibacterial agent is selected from a Chinese gall extract of which the main component is Chinese gall tannin; the antioxidant is selected from isoflavone glucoside; the color fixing agent is selected from rubiadin. Because the Chinese gall extract, the isoflavone glucoside and the rubiadin are natural compounds with good water solubility, the molecular weight is small, difference among dissolubility, a pH value and the like is avoided, a crystalline structure is difficultly formed by the thickening agents or the viscosity regulators in the colloid solution, and the stability of the digital printing pulp can be maintained. The invention also provides a method for carrying out digital printing on fabrics by adopting the digital printing pulp. The process is simple, and the energy consumption is low.