Submersible borehole pump is a underwater working pump, whose pump body is coupled directly with motor, which is widely used for delivering water from deep well, water feeding plants for domestic and industrial applications; Building pressurization plants; Fire fighting system for small and medium plants; Fountains; Sprinkling and flow irrigation plants. Features: 1. Coupling pump-motor, working underwater, safe and stable. 2. No extra requirement on well pipe and pump pipe. 3. Convenient to Install, use and maintence, less room to occur, no need to build pump station. 4. Simple structure, lower cost.