Trade wind is a stable wind zone, moving from the edge of the subtropical high pressure to the equator. It is part of the Hadley cell, which plays an important role in the transport of energy and momentum. In this study, the trade wind characteristics in the North Western Pacific basin are analyzed based on the regression method for wind field, Geopotential height and Trade wind index. This method is intended to distinguish the east trade wind from the northeast wind, which caused by cold infiltration processes. The result shows that trade wind is wind is strongest in late winter and spring, but weakest in summer and autumn. Trade wind if strongly variation over the years and is closely related to ENSO and this method can be used to determine trade wind in general.