An ultra-low volume liquid agent containing hexaflumuron of the invention takes hexaflumuron, or hexaflumuron and active component B as active ingredient, the active ingredient is 0.1% to 30% and the rest is auxiliary agent and solvent to make 100% ultra-low volume liquid agent. The active component B is any one of bifenthrin, ethofenprox, cyfluthrin, diazinon, abamectin, emamectin benzoate, pleocidin, spinetoram, spirotetramat and ethiprole. The invention has simple and convenient production, high working efficiency, less water amount, long effective period, uneasy drug resistance of target, low environment pollution and strong synergism. Insects to wheat, corn, vegetables, tobacco, tea plant, fruit plant, cotton, wood and sugarcane can be prevented by ultra-low volume spray, low volume spray and low volume static electric spray.