Oil-immersed Submersible Pump is widely used in farmland irrigation and drainage, water extraction for sprinkler wells, water supply and drainage systems for industrial and civil buildings, water diversion in hilly and mountainous areas, drainage in low-lying areas, water supply and drainage for urban and rural industrial and mining enterprises and other water conservancy facilities. Its characteristics are that the motor and water pump are assembled into one, with simple structure, convenient installation and disassembly, small footprint, simple use and maintenance, safe and reliable operation, and no pollution to water sources.