Weeding suspending agent and preparation method thereof

The invention discloses a weeding suspending agent which is characterized by comprising 350-650g/L of diflufenican as the active ingredient of an effective body, 25-35g/L of cosolvent, 10-50g/L of wetting agent, 20-60g/L of dispersing agent, 1-5g/L of defoaming agent, 2-5g/L of thickening agent, 1-5g/L of preservative and the balance of water, wherein the total volume of all the components is up to 1000L, and the wetting agent is one or several from methyl phenol formaldehyde resin, polyoxyethylene ether and polyether modified organo-siloxane. The weeding suspending agent has the advantages that no organic solvent is used in the suspending agent, the water is used as the solvent, and therefore, no dust shifting phenomenon is caused in application; the grinding particle size is small, and therefore, the weeding suspending agent is conveniently absorbed by plants, environment pollution is reduced, and the requirement for green agricultural production is met; and the product has the advantages of good stability,