Auxiliary truss device suitable for rural highway bridge field detection

The utility model discloses an auxiliary truss device suitable for rural highway bridge field detection. The device comprises a base arranged on the engineering vehicle, a pair of first driving devices is symmetrically arranged on the two side walls of the base. The first driving device comprises a rack, a gear and a first motor; the rack is fixedly arranged on the side wall of the base; a slidingrod is fixedly arranged on the side wall of the side, away from the base, of the rack. A sliding sleeve is connected to the sliding rod in a sliding manner; the lower side wall of the sliding sleeveis fixedly connected with a first motor through a connecting rod, an output shaft of the first motor is fixedly sleeved with a gear, the gear is meshed with a rack, the upper side wall of the slidingsleeve is fixedly connected with first supporting plates through connecting columns, and a first electric telescopic rod is fixedly arranged on the upper side wall of each first supporting plate. Thebridge detection device is s