The invention relates to a method for synthesizing trifluoroarylethene compounds, belonging to the field of chemical synthesis. According to the method, trifluoroethylene is used as a starting raw material and reacts with easily available iodonium salts under proper conditions to produce the trifluoroarylethene compounds. Compared with traditional methods, the synthetic method provided by the invention has the characteristics of good universality, short reaction time, easy operation and the like; and since the synthetic method has the advantages of low cost, simple process, low pollution and the like, large-scale industrial production of the synthetic method can be realized.