Marine seawater desalination equipment to fully consider the requirements of customers design and production, according to the particularity of the application of special design, small size, light weight, small area, convenient installation, strong adaptability, can be installed in the cramped cabin, deck, cabin crew, corridor space. The equipment is easy to operate and easy to maintain. As long as there is sea water and electricity, fresh water can be supplied immediately after starting. The utility model has the advantages of high desalting rate, stable performance, safe and reliable design, novel and ingenious design, frequent cleaning and no environmental pollution. The equipment frame is made of stainless steel, which is rustproof and corrosion resistant. Power supply for a wide range (220-380-415V/50HZ/60HZ/ three-phase), can adapt to domestic production of most ships. Desalination water quality standards in line with the national drinking water.