The invention relates to ultralow-volume liquid containing lufenuron and organic phosphorus insecticide, which comprises chemical composition, surfactant and solvent. The chemical composition is composed of lufenuron and an active ingredient II. The active ingredient II can be optional one of fenitrothion, dipterex, parathion-methyl, isazofos, pyridaphenthion, quinalphos, triazophos, colophonate, phoxim, fenitrothion, pirimiphos-methyl, fenthion, cyanophos, profenofos, chlorpyrifos-methyl, prothiofos, sulprofos, dimethoate, malathion, methidathion and isocarbophos. The ultralow-volume liquid is convenient in process, long-acting and highly efficient, targets are less apt to resist the ultralow-volume liquid, environment pollution is low, insecticide and water are economized, and insecticide utilization rate is increased. The ultralow-volume liquid can be used for controlling various pests for rice, wheat, corn, vegetables, tobacco, tree trees, fruit trees and sugarcane by ultralow-low spraying, low-volume spraying or ultralow-volume electrostatic spraying.