Supernatant removing device

The utility model discloses a supernatant removing device which comprises a base, a supporting rod is arranged at the top end of the base, a transverse rod perpendicular to the supporting rod is arranged at the top end of the supporting rod, the end, away from the supporting rod, of the transverse rod is fixedly connected with an extraction mechanism through a fixing piece, and the bottom of the extraction mechanism is connected with a liquid taking pipe through a hose. The screw rod is rotated by rotating the knob, the screw rod is in threaded connection with the movable plate, so that the movable plate moves up and down, the screw rod is in threaded connection with the screw rod, the screw rod is in threaded connection with the screw rod, the screw rod is in threaded connection with the screw rod, and the screw rod is in threaded connection with the screw rod, so that the screw rod is in threaded connection with the screw rod. The height of the liquid taking pipe can be conveniently adjusted, the head of th