Insecticide containing nicotine sulfate

The present invention relates to a mixed preparation consisting of two agricultural insecticides with low residual toxicity, i.e. it is a mixed preparation made up by mixing nicotin sulphate with diethofenprox, and adding synergist and regulating its pH value so as to greatly raise the effect of nicotin sulfate. Its ingredients include (wt.%) 4-8% of nicotin sulfate, 1.5-4% of dimethrin, 4-6% of synergist, 4-8% of thickening agent and 75-86.5% of solvent. Said mixture preparation can retain the features of nicotin sulfate, such as residueless, etc., improve its economic condition, reduce the production of drug-resistance of insect and prevent reciprocal antagonism, so that it has the good effect for controlling insects' drug-resistance.