The pesticide soft packaging bag relates to the field of pesticide packaging technology. It consists of an outer layer, a middle layer, an inner layer, an outer layer and a middle layer, and a middle layer and an inner layer. The inner layer is a multilayer layer. The composite film is extruded, and a barrier layer is disposed in the middle of the layer; the utility model has remarkable progress compared with the prior art, and is mainly represented in that: its inner layer adopts a multilayer coextruded composite film provided with a barrier layer, and is solved; The pesticide packaging bag will cause the technical problems of separation and leakage of the composite layer when packaging liquid pesticides, which can effectively enhance the resistance of the liquid pesticide packaging bag after liquid pesticide packaging and its ability to resist drop; Environmental pollution in the packaging, transportation and storage of pesticides has positive significance.