The invention discloses a real-time shift detection device for a bridge support, and belongs to the field of bridge detection equipment. The device comprises a horizontal plate (4) fixedly connected with a support lower steel plate (2), a displacement sensor (3) is fixedly arranged on the horizontal plate (4), and a probe of the displacement sensor (3) is fixedly connected with a contact plate (7) in contact with a support (1); the displacement sensor (3) is separately connected with a power supply (6) and a data display instrument (5); and the data display instrument (5) is connected with the power supply (6). The device can monitor the shifting support in real time to prevent a bridge from being damaged due to excessive shift of the bridge support and is small in floor space, convenient to install, low in cost and anticorrosive, and each component can be recycled.