Abstract:As the component with the highest failure rate of wind turbine,gear box is complicated and difficult to operate and maintain,which affect the failure rate,reliability,maintenance cost of the whole machine and power generation efficiency of wind field. The main theories,methods and research status of fault diagnosis of wind turbine gearbox were analyzed and summarized,and the eight solutions to the existing problems were put forward,namely dynamic character,stage character,multidimensional character,applicable character,integrated character, quantitative character,standardized character and unification character.The development trend of cloud monitoring,intelligent diagnosis and active warning was proposed by combining the advantages of network technology,information technology,big data technology and artificial intelligence.