The invention discloses a weighted paper pulp viscosity regulating device. The weighted paper pulp viscosity regulating device comprises a paper pulp inlet pipe, a suspension crock which is communicated with the paper pulp inlet pipe, and a pedestal. The suspension crock comprises an upright cylindrical overflow port and a bowl-type liquid storage chamber; the bottom of the liquid storage chamber is communicated with a hose; a filter filler is arranged inside the hose; the hose is connected with a V-shaped pipe; the V-shaped pipe comprises a first branch pipe and a second branch pipe; the first branch pipe is arranged close to one side of the suspension crock; an impeller is installed below the V-shaped pipe; the impeller is connected with a water regulating valve; the water regulating valve is installed inside a water inlet pipe which is communicated with the paper pulp inlet pipe; the pedestal is hinged with a equal armed lever; one end of the equal armed lever is hinged with the suspension crock; the other end of the equal armed lever is provided with a counterweight which is able to move along the lever arm; and the impeller is installed on the pedestal. The purpose of the weighted paper pulp viscosity regulating device is to solve the problem of the paper technology of the prior art that the viscosity of the paper pulp cannot be automatically regulated due to lacking of proper equipment.