Steel beam deformation monitoring device

The utility model relates to the field of building equipment, in particular to a steel beam deformation monitoring device which comprises a steel beam, detection assemblies are symmetrically arranged at the two ends of the steel beam, each detection assembly comprises a fixing part, the two ends of each fixing part are connected with sliding rods in a sliding mode, the top ends of the sliding rods are connected with measuring plates, and the top ends of the measuring plates are connected with the bottom end of the top of the steel beam. A transmission plate is connected to the bottom end of the sliding rod, a transmission part is arranged at the bottom end of the transmission plate, a supporting part is connected to the fixing part, a transmission block is slidably connected into the supporting part, a marking assembly is connected to one end of the transmission block, and a transmission part is slidably connected to the other end of the transmission block. The device can automatically mark the detected defor