Mite-killing composition and application thereof

The invention relates to a mite-killing composition and an application thereof. The mite-killing composition comprises bifenazate and nissorun as main components as well as an auxiliary agent and excipient and is made into microemulsion, water emulsion, a suspending agent, wetting powder, a water granule dispersing agent and emulsion oil, wherein the mass part ratio of the bifenazate and the nissorun is 100:1-1:100. The mite-killing composition has favorable synergy effect and can prevent pests from generating drug resistance and prolong the service life of pesticide varieties. The composition can prevent and control tetranychus urticae koch, panonychus citri mcgregor, tetranychus cinnabarinus, tetranychus truncates, tetranychus turkestani, European red mites, hawthorn spider mites, clover mites, schizotetranychus, petrobia latens, tetranychus dunhuangensis, polyphagotarsonemus latus and rust mites; and the effect of the composition is obviously higher than that of two medicines for single use.