The invention discloses a sieve plate type salt dissolving tower. The sieve plate type salt dissolving tower comprises a tower body, a water inlet pipe and a water outlet pipe and is characterized in that the tower body is a sealed cylinder; a plurality of sieve plates are horizontally arranged in the tower body; sieve pores are formed in the sieve plates; the water inlet pipe is arranged at the bottom of the tower body; the water outlet pipe is arranged at the top of the tower body; a salt feeding pipe is also arranged at the top of the tower body. Compared with the prior art, the sieve plate type salt dissolving tower has the advantages that the solid-liquid two-phase contact time is long, the concentration distribution is stable, the outlet solution concentration is high and optimally reaches saturation condition, the tower is safe and reliable, implements continuous production and has high treatment capacity, and the outlet solution concentration is stable.