Carbon fiber has many advantages like good strength、high moudlus、corrosion resistance and fatigue resistance,can effectively improve the blade stiffness,reduce blade weight,increase its service life,improve the utilization ratio of wind energy.With the wide application of lage tow carbon fiber and falling of the carbon fiber price,the application of carbon fiber in large blade has become a trend.In the future,it is necessary that carbon fiber will replace glass fiber in the manufacturing of wind blade and the application of carbon fiber will become wider and wider.