The complete technology of the double-cone rotary vacuum dryer features programmability, automation, continuity, and pipelining, enabling smooth completion of drying technology under vacuum and low temperature conditions, while maintaining the stability of heat-sensitive materials and preventing bacterial contamination. This vacuum dryer can dry various challenging materials and adjust the moisture content of the materials. Compared to centrifugal sprayers with equal output value, its energy consumption is only one-third of the latter. The double-cone rotary vacuum dryer uses a PLC touch screen for operation control and is equipped with continuous maintenance devices. Such reasonable planning, compact layout, and convenient debugging device programs enable it to be installed under most conditions.