Preparation method for efficiently synthesizing ferrocene tetrafluoroborate

The invention relates to the technical field of ferrocene tetrafluoroborate, and discloses a preparation method for efficiently synthesizing ferrocene tetrafluoroborate, which comprises the following steps: at normal temperature, adding ferrocene and p-benzoquinone into a round-bottom flask filled with an absolute ether solution, stirring for 20-50 minutes, then continuously dropwise adding a tetrafluoroborate-diethyl ether complex into the round-bottom flask, stirring, filtering, washing, and drying to obtain the ferrocene tetrafluoroborate. The preparation method comprises the following steps: reacting for 30-60 minutes to generate a bluish violet precipitate in a round-bottom flask, filtering a solution obtained in the round-bottom flask to obtain the bluish violet precipitate, stirring and dissolving the obtained bluish violet precipitate in a round-bottom beaker filled with acetone, then adding absolute ether, separating out the bluish violet precipitate, repeating the step for 3-6 times, filtering the o