NOVELTY - The device comprises an impounding reservoir (402), where water inlet of the water tank is connected with a first one-way valve, a water turbine (406) and a water outlet. The water outlet is present in contact with sea water. A power input shaft (410) of a gear box (413) is connected with a power output shaft of a water turbine and provided with two sets of driving gears that are connected with two sets of driven gears (452, 453). The driven gears are connected with two power output shafts and a first high pressure pump.    USE - The device is useful for sea water desalination and power generation using tidal energy signal (claimed).    DETAILED DESCRIPTION - The device comprises an impounding reservoir (402), where a water inlet of the water tank is connected with a first one-way valve, a water turbine (406) and a water outlet. The water outlet is present in contact with sea water. A power input shaft (410) of a gear box (413) is connected with a power output shaft of a water turbine and provided with two sets of driving gears that are connected with two sets of driven gears (452, 453). The driven gears are connected with two power output shafts and a first high pressure pump. The power input shaft is connected with a power output shaft of the gear box. The first high pressure pump is connected with a water inlet through the first one-way valve, where power of a second high pressure pump is less than the power of the first high pressure pump. A power input shaft of the second high pressure pump is connected with the power output shaft of the gear box. A water inlet of the high pressure pump is present in contact with the sea water through a second one-way valve. Two sets of reverse osmosis membrane components are provided with fresh water outlets and concentrated sea water outlets. The first set of reverse osmosis membrane components is connected with the water inlet of the first high pressure pump. A pipeline of the first high pressure pump is connected with a water outlet. The second set of reverse osmosis membrane components is passed through an electromagnetic valve. The second high pressure pump is connected with two water outlets. The water inlet of the turbine is connected with the first and second sets of reverse osmosis membrane components. A concentrated sea water outlet is connected with the water outlet of the turbine. A power input shaft of an electric generator is connected with a power output shaft and a wheel.    DESCRIPTION OF DRAWING(S) - The diagram shows a schematic view of a sea water desalination and power generation device (Drawing includes non-English language text).    Impounding reservoir (402)    Water turbine (406)    Power input shaft (410)    Gear box (413)    Two sets of driven gears. (452, 453)