Building steel breakpoint detection device

The invention relates to the technical field of building steel breakpoint detection, and discloses a building steel breakpoint detection device which comprises a base, a guide frame capable of adjusting the rotation angle is rotationally installed on the base, a guide groove is formed in the top of the guide frame, and the guide groove is distributed in the axial direction of the guide frame. Two sets of swing rods capable of automatically and synchronously swinging are connected into the guide groove in a sliding mode, ejector rods capable of automatically abutting against the wall face are arranged in the two sets of swing rods, and an instrument frame used for installing a detection instrument is hinged to the tops of the ejector rods. According to the building steel breakpoint detection device, the extension lengths of the two ejector rods are the same, then the base is moved, detection instruments on the two instrument racks can make contact with the roof, the circle center of a guide groove is the arc c