The invention relates to mechanical fault determination and compensation methods and devices, equipment and a medium. The mechanical fault determination method comprises the steps of acquiring real-time data and historical normal data of motion parameters of mechanical parts, and frequency domain data of the real-time data; based on the real-time data, the historical normal data and the frequencydomain data, determining mechanical fault information of the mechanical parts; and based on the mechanical fault information, determining mechanical faults. By adopting the technical scheme, the technical problem of how to determine the mechanical faults in a power switching process is solved; the performance conditions of the mechanical parts can be pre-evaluated in advance; fault points can be accurately positioned, namely, the to-be-damaged or damaged mechanical parts can be accurately positioned, so that the technical effect of determining the mechanical faults in the power switching process is achieved; a maintenance mode can be pre-judged, so that an equipment maintenance system is favorably improved; and maintenance personnel can be informed or scheduled to perform maintenance in anidle period of power switching, so that the maintenance checking time is shortened.