The utility model discloses an utilize mechanical vapor compression sea water desalination device of wind energy belongs to new energy utilization technology field. The water intake pipe that is connected with the sea water intake pump connects a plurality of interconnect's evaporimeter respectively through extra large water heat exchanger A and extra large water heat exchanger B, and fresh water outlet pipe way is connected to the fresh water delivery port of evaporimeter, and fresh water outlet pipe way is connected to condensate water export head through fresh water outlet water pump and extra large water heat exchanger A, benefit water mixer is connected on fresh water outlet pipe way, fresh water goes out water pipeline through and crosses water supplement pipeline connection benefit water mixer, mending water mixer and connecting mechanical vapor compressor and evaporimeter respectively, mechanical vapor compressor connects wind power generation set. The utility model provides an island and coastal area abandon wind -powered electricity generation problem and the not enough problem of fresh water, has effectively utilized unstable wind energy, and has produced fresh water and be used for resident daily life, the wind energy is directly utilized, adopts the inverter type compressor, has reduced electric power system rectification and controlgear.