Marine Sewage Treatment Plant can be used in terrestrial sewage, besides in ship vessels and oil platform. The water quality after treatment can reach the national reuse water quality requirements. It is also applicable to treat the galley, shower drainage which is calle"dgrey water"on condition that the"grey water"is pretreated and there should select a bigger capacity model to match with. This device has obtained one item of Authorized Patent and one item of Practical new patent, meanwhile has been obtained the Type Approval of CCS and IMO circular in April 2009, and it in February 2011 by Germanischer Lloyd(GL)type approval certificate MED made, while providing ABS, DNV, BV, RS and other classification societies certificate.