The utility model provides a vibration fault diagnosis device, include: vibration sensor, alarm, failure diagnosis microprocessor, vibration sensor connects in alarm, failure diagnosis microprocessor, vibration sensor gathers the vibration information of monitoring point to send in the time of in fact alarm, failure diagnosis microprocessor, the alarm basis vibration information confirms whether to send out police dispatch newspaper, failure diagnosis microprocessor basis failure diagnosis is carried out to the monitoring point to vibration information to generate the diagnosis report. The utility model discloses a vibration fault diagnostic can no longer rely on experience and the level to of the smelting power unit equipment with maintainer of examining and repairing, but carries out state monitoring and fault diagnosis according to various intelligent analysis methods, through real -time collection of the smelting power unit running state's vibration data, reports to the police unusually to what of the smelting unit took place to vibration data to probably breaking down are analysed in depth, obtain the complete machine evaluation of unit.