Treatment system for treating ship oily wastewater on ship

The utility model relates to a treatment system for treating ship oily wastewater on a ship. The system comprises a coagulation unit, an electrochemical oily water treatment unit and a secondary oilywastewater treatment unit, wherein the electrochemical oily water treatment unit comprises an electrochemical oxidation tank, more than one anode plate and cathode plates corresponding to the anode plates; the coagulation unit comprises a coagulator body, a stirrer and a first oil decanter; wherein the lower end of the stirrer extends into the coagulator body, the first oil decanter is arranged inthe coagulator body, the liquid inlet end of the coagulator body is in butt joint with an oily wastewater pipeline, and the liquid outlet end of the coagulator body is in butt joint with the liquid inlet end of an electrochemical oxidation tank through a pipeline; the secondary oily wastewater treatment device has the advantages that the energy is saved, the operation and the maintenance are simple, the cleaning is conven