Mixing device

The utility model discloses a mixing device in the technical field of plastic mixing. The mixing device comprises a base, a motor, a mixing rotating shaft, a mixing rod group, a high-pressure fan, a cooling water pipe and the like. The mixing rotating shaft and the mixing rod group are both of a hollow structure, the mixing rod group is communicated with an inner cavity of the mixing rotating shaft, and cooling air holes are formed in the mixing rod group; a high-pressure fan is arranged on the base, a main air pipe of the high-pressure fan is communicated with the mixing rotating shaft, and branch air pipes are communicated with the horizontal air holes of the bearing seats. The interior of the mixing barrel is cooled through a high-pressure fan, and the exterior of the mixing barrel is cooled through a cooling water pipe. And the inclined discharge hole is formed in the bottom of the mixing barrel, and residual materials can be blown to the discharge hole through the material cleaning air hole, so that mate