The invention discloses an Acaricide compound that can prevent a plurality of pests like red spider, etc., in citrus trees and is provided with an effective component of bifenthrin, and the application for the bifenthrin. Component A is bifenthrin, while component B comprises any one of azocyclotin or chlorfenapyr. The weight percentage between A and B in the compound is 1 to 20 : 80 to 1, with the rest being excipient. The advantage lies in that the available component combines with the effect lasting component, which results in obvious synergism action and is characterized by high effect, low pollution, low residue and hard to produce resistance even with long period usage, etc., while being used for controlling the common evil acarines in fruit trees like red spider, white spider, cotton spider, rust spider, tea leafhopper etc., commonly occurring in fruit trees, cotton and tea. From the embodiments 4, 5 and 6, results can be reached that: the control effect on red spiders of the azocyclotin and chlorfenapyr re-preparation is two times higher than that of a single agent of azocyclotin or chlorfenapyr.