The utility model discloses an accurate shale shaker of screening, including the screening case, feed inlet and discharge gate have been seted up respectively to the top and the bottom of screening case, support plate fixedly connected with servo motor is passed through to one side of screening case, servo motor's the output and the one end fixed connection of bull stick, the other end of bull stick and the one end fixed connection of rocker, the other end of rocker run through the ring channel seted up on the screening case and with one side fixed connection of the first motor of screening incasement portion, the output of first motor and the fixed connection of axle center department of nahlock one side. The utility model discloses a to the improvement of arc pole, move arc pole through the nahlock with circle cuff belt when first motor and rotate, can prevent that the lime stone from boning together to having reached and having sieved accurate effect, when starting telescopic cylinder, can make the filter screen remove, under return spring's effect, made filter screen production short time's vibrations, so as to with the lime stone screening thoroughly.