Method for producing bifenthrin with clean synthesizing process

The invention provides a method for producing bifenthrin with a clean synthesizing process. According to the method, 3-(2-chloro-3,3,3-trifluoro-1-allyl)-2,2-dimethylcyclopropane formyl halide and 2-methyl-3-biphenylmethanol are adopted to directly react in one solvent or mixed solvent of more than two solvents in favor of overflow of halogen hydride, halogen hydride generated in the reaction is removed from tail gas in time by means of negative pressure, and the product is directly cooled and crystallized to obtain bifenthrin. The reaction equation is as shown in a formula (3), wherein X is Cl or Br. The production method has the characteristics of high product content, simple process flow, small output of the 'Three Wastes' and the like, and accords with the requirement for clean production.