It is a kind of use of a spiral belt to rotate the material and lift the conical jacket and the hollow spiral ribbon into the heat transfer medium (such as hot water, heat transfer oil, steam, etc.), so that the heated material is lifted from the periphery and falls from the middle, which is fast. The cycle is reversed continuously, and the water vapor is taken away in time through the vacuum in the cylinder, so that the material can be dried and mixed in a short time. Compared with the traditional vertical mixer, there is no transmission mechanism in the cylinder, which fundamentally eliminates the material pollution caused by the leakage of lubricating oil, and the operation is reliable and stable. It is especially suitable for the mixing of powder and particles with high hygienic requirements. The viscous fluid or the thick and wet main material is stirred and mixed; compared with other horizontal dryers, it has the convenience of discharging, can be completely discharged 100%, and is convenient for operation and maintenance. Its drying efficiency is 3-5 times that of the same specification "double cone rotary vacuum dryer".