Jiangsu Taian drying equipment manufacturing Co., Ltd. The agitator of the rotary flash dryer can drive the hot air entering the drying chamber from the distribution chamber to generate high-speed rotating airflow, thus forming a stable fluidized bed layer, avoiding the unstable fluidization such as spouting and channeling caused by local sticking and plugging; secondly, due to the high-speed rotation of multiple groups of blades on the agitator, the bulk materials are continuously crushed, so that the drying surface of the materials is constantly updated, As a result, the heat and mass exchange is strengthened and the drying rate is increased. In addition, the gap between the blade on the agitator and the wall of the drying tower is very small, so the materials bonded on the wall can be cleaned up in time to prevent the materials from being denatured due to long-term retention.