Thiacloprid is a new nicotine insecticide. It mainly acts on the posterior membrane of insect nerve junction. By binding with nicotinic acetylcholine receptor, it interferes with the normal conduction of insect nervous system, causes the blockage of nerve channel, and causes a large accumulation of acetylcholine, so as to make insects abnormally excited and die of systemic spasm and paralysis. It has strong contact killing, gastric toxicity and internal absorption effects. Thiacloprid has excellent control effect on important pests on pear fruits, cotton, vegetables and potatoes. In addition to aphids and whiteflies, it is also effective on various beetles (such as potato beetle, apple flower weevil and rice weevil) and Lepidoptera pests such as leaf miner and apple bark moth on apple trees, and is applicable to all corresponding crops.