Dewatering sewage submersible pumps are specialized pumps designed to remove excess water and sewage from various environments, including construction sites, municipal wastewater treatment facilities, and flooded areas. The design is designed to a wide tunnel which helps to convey the long fiber liquid or the solid whose diameter. The selection of bottom suction structure, stainless steel and special cast iron make the pump have the capabilities of complete drain and high resistance of abrasion and corrosion. The float switch can automatically control on and off with the change of the liquid level. The protector in the motor can automatically cut off the power when it is overheated, thus guarantee the security and reliability of pump's run even in the atrocious environment.