The powder conveying device refers to a device that uses compressed gas as the power to transport dry powder materials through gas energy, achieving closed transportation from the feeding point to the unloading point, and avoiding dust flying. To improve conveying efficiency, pneumatic conveying systems are used in multiple fields such as new energy, fine chemicals, food and medicine, plastics, etc. It has the characteristics of sealing, flexibility, easy maintenance, high efficiency and cleanliness. As an efficient and economical conveying method, powder conveying device can reduce the degree of manual intervention, lower labor costs, and assist in large-scale modern production needs through automated equipment.