Measuring point nailing device for detecting deflection of bridge

The utility model relates to a measuring point nailing device for detecting the deflection of a bridge, which comprises a mounting frame, a power hammer and a nail fixing assembly are arranged on the mounting frame, the nail fixing assembly is positioned below the power hammer, the nail fixing assembly comprises a fixing plate and two elastic clamping blocks, a through hole is formed in the fixing plate, and the elastic clamping blocks are arranged on the fixing plate. The two elastic clamping blocks are oppositely arranged on the inner side wall of the through hole, a through groove is reserved between the two elastic clamping blocks, and the through groove is located under the power hammer. The power hammer simulates a manual hammering mode to conduct nailing, an operator can stop hammering at any time according to the nailing depth of a steel nail, the nailing depth of the steel nail is controllable, operation is easy, use is more flexible and convenient, the steel nail is fixed through the nail fixing ass