QW submersible efficient non-clogging sewage pump with large runner anti-clogging hydraulic components designed to greatly improve the dirt through the ability to effectively pass the pump diameter of 5 times the fiber material and the diameter of the pump diameter of about 50% of the solid particles. Reasonable design, matching motor reasonable, high efficiency, energy-saving effect is remarkable. Mechanical seal with dual series sealed, made of hard wear-resistant tungsten carbide, durable, wear-resistant and so on, can make the pump safe and continuous operation of more than 800 hours. Pump structure is compact, small size, easy to move, easy to install, no need to build pump room, dive into the water to work, greatly reducing project costs. Pump oil chamber with oil-water probe, when the pump-side mechanical seal damage, water into the oil chamber, the probe signal, the pump protection. According to user needs with automatic safety control cabinet, the pump leakage, leakage, overload and over-temperature monitoring, etc., to ensure the safe and safe operation of the pump. Double rail automatic coupling installation system, to the pump installation, maintenance has brought great convenience, people do not have to enter the sewage pit for this purpose. Float switch according to the desired level changes. Automatic control of the pump stop, no need for special care. The motor is not overloaded. According to the occasion of the use of motor water can be used outside the third party circulating cooling system to ensure that the pump in the dry (dry) state safe operation. Installation of a fixed automatic coupling installation and free installation of two mobile to meet different applications.