The invention discloses a vegetable dye for fabric. The vegetable dye is prepared from, by weight, 15-25 parts of color paste, 5-10 parts of butyl acetate, 2-7 parts of antibacterial agent, 2-4 parts of polydimethylsiloxane, 5-10 parts of sodium propionate, 3-6 parts of dyeing acid, 1-3 parts of sodium citrate and 60-80 parts of deionized water. Natural plants serve as raw materials of the fabric dye, the materials are convenient to get, no toxic action is generated on the human body, and the fabric has a faint scent and good bio-solubility and environment compatibility, and can be widely applied to the field of fabric printing and dyeing. In addition, the dye is wide in antibacterial property, can effectively prevent breeding and propagation of various bacteria, does not contain a chemical agent or metal components, and is safe, harmless, natural and environmentally friendly.