Abstract: Abnormal vibration partly appears on the floor of the main shaft tower in operation of Muducaideng mine, which is unable to meet the requirements of safety production. Through analysis and detection, motor stator side is eventually determined to be the vibration source, and the motor control coupling vibration caused by equipment deficiency leads to the resonation between the shaft tower floor and the motor for the inherent frequency of the former is very close to the vibrational frequency of the latter. This paper tries to reveal the reasons and puts forward proper vibration treatment schemes.