Building steel structure ultrasonic detection device

The invention belongs to the field of building material detection, and particularly discloses a building steel structure ultrasonic detection device which comprises two fixing plates distributed in parallel, a telescopic assembly used for adjusting the width is additionally arranged between the two fixing plates, and an ultrasonic detection supporting leg assembly used for supporting and detectinga steel structure is arranged on the telescopic assembly. The device further comprises a plurality of clamping rod structures. The multiple clamping rod structures are distributed on the fixing platein an array mode. The clamping rod structure is composed of a plurality of unit roller structures capable of rotating to improve maneuverability. Multiple unit roller structures are adjustably connected through angle-adjustable movable connecting assemblies; different radian adjustment of the clamping rod structures is combined with adjustment of the distance between the two fixed plates which are distributed in parallel