Square tubular column size measuring device for trail-manufacturing of lashing bridge

The utility model discloses a square tubular column size measuring device for binding bridge trial-manufacture, which comprises a transverse plate, vertical plates are hinged to two ends of the transverse plate, clamping blocks are hinged to the bottoms of the vertical plates, a grip is arranged in the middle of the transverse plate, and a driving part for driving the vertical plates to rotate is arranged below the grip. An elastic piece is further connected between the transverse plate and the vertical plate, the vertical plate is provided with an adjusting part connected with the clamping block, and the adjusting part is used for adjusting the rotation angle of the clamping block when the vertical plate rotates under the action of the driving part so that the end face of the clamping block can be perpendicular to the length direction of the transverse plate all the time. The rotatable vertical rods are arranged at the two ends of the transverse plate, the clamping parts for measurement are arranged at the b