The present invention belongs to the field of insecticides, and relates to a pest-killing and mite-killing composition, which contains an active component A and an active component B, a weight part ratio of the component A to the component B is 1:99-99:1, the active component A is selected from a compound I represented by the following structural formula, the active component B is selected from an organic phosphorus pest/mite killing agent, a nicotine type acetylcholine receptor (nAChR) agonist pest/mite killing agent, an apastia pest/mite killing agent, a proton gradient interference and oxidative phosphorylation affecting uncoupling pest/mite killing agent, a nereistoxin analog pest/mite killing agent, a Ryania receptor regulating pest/mite killing agent, a voltage-dependent sodium ion channel blocking pest/mite killing agent, an ecdysone receptor stimulating pest/mite killing agent, an amino butyric acid (GABA) gated chloride channel antagonism pest/mite killing agent, a microorganism pest/mite killing agent or other pest/mite killing agents, and the active component A has the following structure. The composition of the present invention has advantages of significant synergy, resistance delaying and the like, and can be used for prevention and control of a variety of pests. The compound I is defined in the instruction.