Bridge displacement detection device and method

The invention relates to the technical field of displacement detection equipment, in particular to a bridge displacement detection device which comprises a main detection seat, a main fixing seat, an auxiliary detection seat, an auxiliary fixing seat, a rope positioning adjusting frame, a rope positioning frame, a rope displacement detection sensor, a detection module, an instrument panel and a bridge floor detection sensor. The main fixing seat is adjustably arranged on the main detection seat; a to-be-detected bridge is located between the main detection seat and the main fixing seat. The auxiliary detection seat is adjustably arranged on the auxiliary fixing seat; a bridge to be detected is located between the auxiliary detection seat and the auxiliary fixing seat. The detection module is used for detecting data of the rope displacement detection sensor on the rope positioning frame and detecting data of the bridge floor detection sensor at the same time. The detection device is fixed on the bridge for a l