It is composed of a variety of anionic and nonionic surfactants. It has good compatibility with paraquat mother liquor, strong resistance to salt and hard water, and the diluent is a transparent true solution. The additive has a significant synergistic effect and can Greatly improve the control effect of paraquat on foxtail, larkspur, quinoa, thistle and other weeds. In addition, the additive has excellent thickening properties. The water agent prepared with this additive has good wall-hanging property, high sensory viscosity, strong frost resistance, and good dispersibility in water.