Gypsum powder machine, also known as drying hammer, is used for crushing and drying soft and non abrasive materials, such as gypsum, chalk, clay, slurry filter cake, etc. It can disperse, dry, and calcine industrial by-products gypsum and flue gas desulfurization gypsum. This machine has high production efficiency, low energy consumption, and has the function of dispersing and crushing while drying. The rotating rotor disperses the material, hot air dries the material, and the airflow brings the broken and dried material to the separation chamber. The fine powder then enters the cyclone for separation, and the coarse particles return to the hammer crusher for further crushing.