The utility model discloses a vertical dewaterer, comprising a pedestal, a material washing device and a dewatering device. The material washing device comprises a material washing drive unit, a material washing barrel, a material washing rod and a sprinkler. The dewatering device comprises a dewatering motor, a dewatering chamber, a screw and a cylindric separating screen sieve. The material washing barrel is horizontally arranged on the pedestal; one end of the material washing rod is connected with an output shaft of the material washing drive unit; the other end of the material washing rod is inserted into the material washing barrel in a sealed manner; a material feeding opening is opened upwards at an outer side wall at one end of the material washing barrel; the sprinkler is arranged on the material feeding opening; the other end of the material washing barrel is connected with a bottom of the dewatering chamber; the separating screen sieve is arranged in the dewatering chamber; the dewatering motor is vertically arranged at the top of the dewatering chamber; and the screw is arranged in the separating screen sieve and is connected with an output shaft of the dewatering motor. The vertical dewaterer also has the material washing function; working efficiency is high; and dewatering effect is good.