The utility model discloses a marine portable well -flushing water treatment facilities, including settling cask, static microbubble floatation device, sewage buffer tank, a metallic membrane filtration ware, the 2nd metallic membrane filtration ware, nitrogen gas storage tank and nitrogen generator, settling cask, static microbubble floatation device, sewage buffer tank connect in order, and sewage buffer tank's play water end (W. E. ) is connected to the income water end (W. E. ) of a metallic membrane filtration ware or the income water end (W. E. ) of the 2nd metallic membrane filtration ware, the play water end (W. E. ) of a metallic membrane filtration ware with filter water outlet pipeline is connected to the play water end (W. E. ) of the 2nd metallic membrane filtration ware, nitrogen generator connects the nitrogen gas storage tank, a metallic membrane filtration ware and the 2nd metallic membrane filtration ware are connected to the nitrogen gas storage tank, just static microbubble floatation device is still connected to the nitrogen gas storage tank. The utility model discloses device compact structure, the treatment effeciency is high, and the processing procedure need not to throw and adds any medicament, and the metallic membrane filtration ware adopts nitrogen gas to carry out the back flush, has practiced thrift a large amount of anti - flushing water, has reduced treatment cost.