The double shaft non gravity mixer horizontal shaft is equipped with biaxial rotating reverse blades, and the blades rotate at a certain angle in the axial and radial directions. To make full use of the principle of convective mixing, that is, the flow layer is formed by the throwing motion of the material in the mixer, resulting in the instantaneous weightlessness, so that the material is quickly mixed and evenly thrown up and down and the material is mixed and mixed.