Bentonite fine screening device

The utility model discloses a bentonite fine screening device which comprises a bottom plate, four supporting plates are fixedly connected to the upper side of the bottom plate, a fixing rod is fixedly connected between every two supporting plates, a sliding plate is connected to the two fixing rods in a sliding mode, and two reset springs are arranged on each fixing rod in a sleeved mode. An electric vibration device is arranged on the bottom side wall of the sliding plate, a screening box is fixedly connected to the upper side of the sliding plate, a shifting plate is fixedly connected to the bottom side wall of the screening box, a manual vibration device is arranged on the upper side of the bottom plate, the screening box is obliquely arranged, and a feeding through hole is formed in the upper side wall of the screening box; and a filter screen is fixedly connected to the interior of the screening box. The manual vibration screening device is reasonable in design and ingenious in conception, manual vibrat