The invention provides a building anti-vibration supporting hanging bracket and an anti-vibration performance on-line monitoring method thereof. The building anti-vibration supporting hanging bracketcomprises a top plate, a damping device, a cross rod, supporting rods and the like, wherein the damping device is arranged at the bottom of the top plate through hanging bracket bodies, and the crossrod is arranged at the bottom of the damping device and is fixed on the wall through the plurality of supporting rods. The anti-vibration performance on-line monitoring method of the building anti-vibration supporting hanging bracket is characterized by comprising following steps that stress parameters of each component of the building anti-vibration supporting hanging bracket are collected, moreover, the collected data are monitored in real time, the anti-vibration performance is analyzed through fitting calculation between original data and real-time measurement data, and whether the components of the building anti-vibration supporting hanging bracket need to be maintained or replaced or not is judged.