The invention discloses a rotating equipment vibration monitoring protection device channel abnormity detection method. The rotating equipment vibration monitoring protection device channel abnormity detection method comprises steps that a vibration monitoring protection device is used to acquire correlation coefficients of various channels according to positions of detection points corresponding to the various channels and the characteristics of the rotating equipment, and weights are set according to engineering experience; the vibration monitoring protection device is used for the real-time monitoring of the vibration data of the various channels, and is used to detect whether the changing trend of the vibration data meets the correlation constraints of the channels; the vibration signals of one channel are enhanced or weakened abnormally, and the vibration signals of other related channels are not changed, and the situation is repeated a plurality of times, the channel is determined to be abnormal, and abnormality of sensors and abnormity of device sampling channels are included. By adopting the analysis and the real-time detection of the vibration detection point correlation, whether the abnormal change of the single channel meets the correlation constraints is determined, and therefore the self-inspection of the rotating equipment vibration monitoring protection device is completed, and the reliability of the device is improved.