Submersible cutting sewage pump

The utility model discloses a submersible cutting sewage pump which comprises a pump body. The pump body is provided with an impeller accommodating cavity, a water inlet communicated with the impeller accommodating cavity and a water outlet; an impeller is arranged in the impeller accommodating cavity along the vertical axis direction of the pump body; a cutting cutter head and a rotary cutter are sequentially arranged at the position of the water inlet coaxial with the vertical axis of the pump body; an oil tank and an oil tank cover are arranged at the upper part of the impeller accommodating cavity; an enclosure and a stainless steel drum sleeving the enclosure are arranged at the upper part of the pump body; a shaft for installing the impeller penetrates through the oil tank to be connected to a rotor assembly positioned inside the enclosure; a stator assembly matched with the rotor assembly is arranged inside the enclosure; a shaft positioned in the oil tank is provided with a mechanical seal; a bearing for installing the shaft is arranged at the top of the oil tank and at the upper part of the enclosure; a hanging cover is arranged at the top of the enclosure; a lip-shaped sealing ring matched with the shaft is arranged at the lower part of the oil tank cover. The sewage pump can implement a function of sequentially discharging impurities in sewage, such as continuous fibers, plastic bags, gloves and sanitary towels, after the impurities are cut up.