Objective To study the measurement of flow properties of powders and granules based on Jenike theories and hopper designs. Methods The flowability of sand granules with three particle size grades (0.25,0.5,1) and dry-mixed mortar with nine kinds of mix ratios (1 ∶9~9 ∶1) were investigated using the Jenike flow function and F values as the characterization parameters. The industrial mortar M5 and M10 were chosen to design the hopper based on Jenike theories. Results With an increase in particle size, the F values varied from 10.56 to 21.78. Experimental results showed that the flowability of the sand granules could be obviously improved by increasing the particle size, because of the decrease in specific surface area and interaction between particles. Jenike flow function curves and F values could directly reflect the flowability of nine dry-mixed mortars, presenting the flow tendency. Obvious trends could be predicted in the flow function curves with an increase in sand content levels. Wall friction test of M5 showed that 304 stainless steel was more suitable as wall material. The hopper structural parameters (semi-vertex angle 42.15°, outlet size 0.72 m) were obtained based on Jenike theories. Conclusion The flow properties were perfectly characterized and evaluated based on Jenike theories, and the design parameters of hopper structure for dry-mixed mortar Automatic Packaging Machine were obtained. This study is of theoretical guiding significance for the design of powder material auto-packaging systems.