Grinding device used before preparation of bacterial liquid

The invention discloses a grinding device before bacterial liquid preparation, which comprises a culture dish, a grinding net is attached to the upper part of the culture dish, the center position of the grinding net is fixedly connected with a center shaft, the bottom end of the center shaft is fixedly provided with a mounting seat, the periphery of the mounting seat is connected with a plurality of centrifugal ribs which are equidistantly and uniformly arranged, and the centrifugal ribs are fixedly connected with the center shaft. And a plurality of centripetal ribs are uniformly mounted at the bottom end of the grinding net at equal intervals. By arranging the grinding net, the centrifugal ribs and the centripetal ribs and utilizing mutual cooperation of the grinding net, when bacterial colonies are placed under the grinding net, continuous rotary grinding operation can be conducted on the bacterial colonies through the grinding net, and meanwhile the centrifugal ribs and the centripetal ribs are oppositel