The invention provides an avermectin-containing pesticide in the dosage form of missible oil. An active ingredient of the pesticide is avermectin. Formula of the pesticide contains the following components, by weight, 20% of flutenzine, 8% of avermectin, 1% of an emulsifier, 1% of a solvent, 1% of a cosolvent and deionized water added to 100%. Avermectin has good synergism. The pesticide provided by the invention has advantages of synergistic effect, low use cost, good control effect, wide acaricidal spectrum, high adaptability, long persistent period, low toxicity, low residue content, good safety and high compatibility, and can be used for killing both egg and larvae.