▎ 摘　　要

NOVELTY - The utility model model claims a powder filter, comprising a sieving box and a grinding box, two sides of the inner wall of the sieving box are connected with a fixing block, the fixing block is connected with a same round rod, the outer wall of the round rod is slidingly connected with a same screen, the outer wall of the bottom end of the round rod is sleeved with a spring, two sides of inner wall of the sieving box is rotatably connected with a first rotating shaft, outer wall of the first rotating shaft is equidistantly sleeved with multiple cams, one side of outer wall of the sieving box is provided with a grinding box, two sides of inner wall of the grinding box are rotatably connected with a second rotating shaft, outer wall of the second rotating shaft is sleeved with a grinding roller. Compared with the existing device, the utility model model does not need to manually recycle the agglomerated powder into the grinding machine for grinding again, which graphene the filtering efficiency.