Mud water monitoring sensor

The utility model discloses a mud water monitoring sensor, which comprises a capacitor and a treater, wherein the capacitor is arranged in mud water; and the treater is connected with the capacitor and acquires mud and water mixing concentration and the thickness of sludge according to the capacitance value of the capacitor in the mud water. A medium between capacitor plates is analyzed by the treater according to different mud and water mixing degrees and different conductivities of a mud water mixture by calculating the capacitance of the sensor so as to obtain the mud and water mixing concentration and the thickness of the sludge. The sludge is treated in time according to the height of the sludge in a water cabin and the turbidity of the mud water in the water cabin, so that burnout failure of the water pump due to blocking of a water inlet pipe of a water pump by the sludge is avoided.