Abstract: The fan blade fault detection technology based on SCADA data is taken as the research object. Firstly, the fault types and causes of fan blades are analyzed, and the pre-processing technology of SCADA system monitoring data and the establishment of blade fault diagnosis model in the past ten years are studied. After comprehensive comparison, In this paper, a cross-validated recursive feature elimination (RFECV) method and a fault diagnosis model based on random forest algorithm are proposed to deal with more blade faults. Finally, the future development direction of fan blade fault detection technology is summarized and suggested.