The forced mixer mainly relies on the stirring blades to force the materials to stir and mix. The stirring shaft drives the stirring blades to rotate at high speed in the mixing drum, exerting strong shear force, extrusion force and impact force on the materials in the drum, so that the materials can be fully stirred and mixed in a short time, which can effectively overcome the internal friction and viscosity of the materials, and evenly mix the materials with large particle size, strong viscosity or complex proportions.