Abstract: With the proposal of "30.60" Double Carbon Project, the wind power industry has ushered in new development opportunities. As China's wind power enters the era of parity, the cost of power per kWh is reduced with the continuous increase of the single capacity of wind turbine system, which also leads to significant increase in the wind blade length. Wind blade is now facing the contradictive requirements of "large-scale, low-cost and lightweight". Both new material and innovative processing technology are of great importance to promote wind power to the parity era. On one hand, several key raw materials, including reinforcing fiber, matrix resin, core and structural adhesive, that affect the performance and cost of wind blade are systematically examined. On the other hand, high quality blades and green environmental protection are of great concern for the wind power industry, which indicates that new processing technology such as prepreg and pultrusion are playing more and more important role in future large scale blade manufacture. Thereafter, with systematic consideration of the materials and processing technologies in the development of wind blade, some suggestions are proposed on the introduction of these materials and technologies, in order to provide some reference for future large-scale wind blade development.