The invention provides aqueous plastic-plastic compounding glue water for soft packaging, and relates to compounding glue water. The compounding glue water is prepared from the following ingredients in parts by weight: 20 to 30 parts of acrylic ester monomers, 1 to 5 parts of acrylic acid or methacrylic acid, 2 to 4 parts of alkyl methacrylate esters, 10 to 20 parts of styrene or acrylonitrile, 1 to 2 parts of acrylic acid hydroxyl esters, 0.2 to 1 part of N-Methylol acrylamide or diacetone-acryloamide, 1 to 5 parts of adipic dihydrazide, 0.4 to 0.8 part of itaconic acid, ethylene dimethacrylate or diallyl maleate, 0.3 to 1 part of emulsifying agents, 0.2 to 0.8 part of initiating agents, 0.1 to 0.3 part of buffering agents and 0.3 to 1 part of wetting agents. According to the material structure matching, the dry glue coating quantity per square meter can be controlled to be 0.5 to 2g, and the requirements can be met, for example, thin BOPP / CPP only needs 0.5 kg of dry glue, and the transparency and the firmness degree can reach the requirements; the cost of glue water used in per square meter is as low as 0.02 Yuan RMB; the product can be used on an original dry type compounding machine; the addition of equipment investment is not needed.