The invention provides alcohol aqueous gravure plastic composite printing ink. The alcohol aqueous gravure plastic composite printing ink comprises the following components in parts by mass: 35 to 48parts of polyurethane modified acrylic acid emulsion, 0.5 to 2 parts of a macromolecular type dispersing agent, 0.2 to 1 part of water-based polyethylene wax, 0.5 to 1 part of fumed silica, 10 to 38 parts of pigment powder, 0.5 to 2 parts of triethanolamine, 12 to 29 parts of ethanol and 4.9 to 20 parts of deionized water. End sealing is conducted by utilizing organic amine with a low boiling point, the organic amine with the low boiling point is introduced, the amine with the low boiling point is volatized slowly at normal temperature, a large amount of hydrophilic groups still exist in resin, and high dissolubility is achieved in an alcohol water system; when the resin is prepared into the printing ink and passes through a drying oven, escape of the amine with low boiling point on the resin is accelerated, so that the resin hydrophilic groups are greatly reduced, volatilization of water is accelerated, the printing ink is water-resistant after being dried, the printing ink on a printing plate is still at normal temperature, a large amount of hydrophilic groups still exist, high re-dissolubility is still achieved within a period of time and the printing use requirement is met.