GNSS-based bridge real-time deformation monitoring method and system

The invention belongs to the technical field of bridge monitoring, and particularly relates to a GNSS-based bridge real-time deformation monitoring system, which comprises an acquisition module, the acquisition module comprises a plurality of GNSS receivers installed at monitoring points, and each GNSS receiver is used for acquiring first position data of each monitoring point; a plurality of auxiliary monitoring points are arranged on the two sides of each monitoring point in the bridge path direction at intervals, collection sub-modules are arranged on the two sides of each GNSS receiver respectively, each collection sub-module is used for collecting second position data of each auxiliary monitoring point on the same side, and the collection sub-modules on the two sides support the two sides of the bottom of the GNSS receiver; by arranging the GNSS receiver and the acquisition sub-module, when the bridge deck deforms, the local deformation condition of each monitoring area can be obtained by combining the a