Submersible sewage pump has many advantages, such as compact structure and small floor area. Because the submersible sewage pump works under the liquid, it can be directly installed in the sewage tank, without the need to build a special pump room to install the pump and machine, which can save a lot of land and infrastructure costs. Easy installation and maintenance. Small sewage pump can be installed freely, large sewage pump is generally equipped with automatic coupling device, can be installed automatically, installation and maintenance is quite convenient.