Wind power generation is affected by natural conditions, and the emergence of some special meteorological conditions may cause wind turbines to malfunction. The narrow nacelle cannot have a solid foundation like on the ground. The power matching of the entire drive train and the torsional vibration Factors are always concentrated on a weak link. A lot of practice has proved that this link is often the gearbox in the unit. Therefore, it is particularly important to strengthen the research on the gearbox and pay attention to its maintenance. The second section design requires that the design must ensure that the structure is simplified and the weight is the lightest under the premise of meeting reliability and expected life. Generally, CAD should be used to optimize the design, schedule the best transmission scheme, select reasonable design parameters, select stable and reliable components and materials that have good mechanical properties and remain stable under extreme environmental temperature differences .