The utility model relates to special hydrofluoric acid preparation equipment, which comprises a reaction kettle, a feed opening of the reaction kettle and a discharge opening of the reaction kettle. The discharge opening of the reaction kettle is connected with a finished product barrel via a delivery pipe, a kettle body of the reaction kettle is a stainless steel kettle body or graphite kettle body, the discharge opening of the reaction kettle is connected and communicated with a reflux column arranged at the top of the reaction kettle, a packing layer is disposed between an outlet of the reaction kettle and the reflux column, the reflux column is provided with a cooling pipe, the head end and the tail end of the cooling pipe are respectively fixed via flanges and respectively penetrate through the flanges, a tetrafluoride material layer is lined on the inner wall of the cooling pipe in the reflux column, an outlet of the reflux column is connected with a chief barrel and a semi-finished product barrel, and an outlet of the semi-finished product barrel is connected with the finished product barrel after being sequentially connected with an assembly barrel and a filter. The special hydrofluoric acid preparation equipment is characterized in that the top and the bottom of the reaction kettle are connected with liquid level observation tubes, the liquid level observation tubes are transparent tubes, and tetrafluoride material layers are lined on the inner walls of the liquid level observation tubes.