The invention discloses a wind energy seawater desalinization device. The wind energy seawater desalinization device comprises a seawater treatment device and a fresh water tank, wherein a fixed baseis arranged under the seawater treatment device; a plurality of bolt holes are formed in four sides of the fixed base; a seawater treatment tank is arranged on the fixed base; a treatment space is arranged in the seawater treatment tank; a support column is arranged at the upper part of the top of the left side of the seawater treatment tank; the support column and the seawater treatment tank forman integrated structure; the upper part of the support column is fixedly connected with a circular tank; a circular space is arranged in the circular tank. Through the wind energy seawater desalinization device, the wind energy is used for blowing the blades to rotate and drive a rotating shaft to rotate, so that a piston rod in a seawater pressurizing device is driven to do reciprocating motionand complete pressurization of the seawater; the pressurized seawater is subjected to reverse osmosis through a seawater filtration membrane; the fresh water enters a fresh water channel and subsequently flows into a pressure boosting device; the high-pressure seawater after reverse osmosis passes through a pressure boosting device so as to boost the pressure of the fresh water, so that the freshwater is conveniently conveyed; the repeated utilization of the energy is achieved.