Cement dryer is the heat and dry device of material. The material of axle sleeve rotation barrel is dried in the process of helical blade and intermission helical flitch’s reentry and lifting in an out the barrel. Jacket casting structure makes the length of cement dryer shortened twofold. As heating delivery surface decreases greatly, the heat consumption decreases, the increased heat exchange surface boosts the heat response greatly. For the material that can’t contact smoke, the multi-cylinder cement dryer offers internal flue and ring form flue with radial direction smoke path linked and it is of the same efficiency. It can be seen that for hot material and cold medium, the cement dryer is acted as the telescope-feed rotation cooler.