The invention discloses a turbo type pressurizing device of a disc granulator. An inner cylinder is arranged in a shell; the upper part of one side of the inner cylinder is communicated with a water inlet pipe; the bottom of the other side of the inner cylinder is communicated with a water outlet pipe; a motor is arranged below the inner cylinder; the rotating shaft of the motor is connected with a turbine rotating shaft; a first turbine, a first rotating turbine, a second turbine and a second rotating turbine are arranged on the turbine rotating shaft from bottom to top; the first and second turbines are fixedly connected with the turbine rotating shaft; and the first and second rotating turbines sleeve the outside of the turbine rotating shaft through a rotating sleeve and are not connected with the turbine rotating shaft. After the turbo type pressurizing device is arranged at the disc granulator, the problem of water pressurizing during fertilizer granulation can be solved; the processes of granulating and water supply and spraying are integrated; and the dust is proofed, the loss of raw materials is reduced and the environment is effectively protected.