The invention relates to a vapor scrubbing tower device for secondary vapor in a vacuum salt production process. The device comprises an upper straight pipe, wherein a spraying straight pipe and two spraying bend pipes are separately arranged through the side wall of the upper straight pipe; a cylindrical cone-shaped shell is integrally welded below the upper straight pipe; a grating supporting plate is mounted on the upper part of the cone-shaped shell; a filler layer is paved on the grating supporting plate; the lower end of the upper straight pipe penetrating through the filler layer and the grating supporting layer extends to the middle of the cones-shaped shell; sprayed water is collected from the lower cone shell and is discharged, and secondary vapor released by the upper straight pipe reversing at 180 degrees to remove liquid drops and Cl<-> through the grating supporting plate and the filler layer and to be discharged by an exhaust pipe. The device can remove liquid drops andCl<-> ions in the secondary vapor effectively to obtain pure gas, the content of Cl<-> I is smaller than 5ppm, so that the defect that the cost of the equipment is high or the purity is not enough isthoroughly overcome.