The invention discloses an automatic quantitative fluidity testing device and method for powder materials, which consists of three parts: a mechanical part, a microcomputer test system hardware and software, wherein the mechanical part includes a silo, a frame, an artesian conveying part, a vibrating conveying part and Weighing platform, aiming at the natural flow of powder materials under the action of gravity and the conveying flow under the action of external force, the flow rate and flow rate change rate are determined as the dynamic evaluation index of fluidity. Velocity and flow rate of change measurement, to achieve automatic quantitative fluidity analysis of powder materials, the invention can measure the flow stability and rapidity of different powder materials, under different production environments and equipment structure materials, so as to analyze The influence of material characteristics, environmental factors, and dosing devices on the fluidity of powder materials provides theoretical basis and experimental data for the study of automatic dosing and the improvement of automatic dosing performance.