NOVELTY - A seawater desalinating device comprises a power generating unit; an energy storing unit having a storage battery group; and a seawater desalinating unit having a seawater extracting pump, a preposed filter, a cartridge filter, a high-pressure pump, an anti-permeability membrane group and a fresh-water tank which are connected with each other by pipelines in series. The power generating unit is electrically connected with the storage battery group by a rectifying-controlling unit.    USE - Seawater desalinating device of clean energies such as wind, light and sea tide flow.    ADVANTAGE - The device uses wind, light and sea tide flow to complementary generate electricity, so as to provide power to the seawater desalinating device and make the application of the device be not limited by the electric supply any more. The desalinating device can be conveniently applied to places such islands, offshore platforms and fish rafts.    DETAILED DESCRIPTION - A seawater desalinating device comprises a power generating unit; an energy storing unit having a storage battery group; and a seawater desalinating unit having a seawater extracting pump, a preposed filter, a cartridge filter, a high-pressure pump, an anti-permeability membrane group and a fresh-water tank which are connected with each other by pipelines in series. The seawater extracting pump and the high-pressure pump are separately electrically connected with an electric control gear. The power generating unit is electrically connected with the storage battery group by a rectifying-controlling unit. The storage battery group is electrically connected with the electric control gear, and the seawater extracting pump is electrically connected with the high-pressure pump. The device comprises a solar-cell panel having a monocrystalline silicon solar-cell panel group.    DESCRIPTION OF DRAWING(S) - The drawing is a schematic sectional view of a seawater desalinating device (Drawing includes non-English language text).