The present invention belongs to the technical field of insecticides characterized by surfactants, and specifically relates to a miticide. The miticide includes a surfactant and a penetrant. The miticide has good, quick-acting effects, long effective period, safe and environment friendly, good stability, and a wide range of applications. The miticide is not only capable of being used for exterminating agricultural and forest mites, but is also capable of being used for exterminating medical and animal husbandry mites. The miticide has few to none drug residues and has good stability in acaricidal effect. Moreover, the miticide is convenient to use, and may be used either alone or added directly into other insecticides.