Adjustable auxiliary device for installation of cross arm

The invention discloses an adjustable auxiliary device for the installation of a cross arm, and the device comprises a locking clamping rod, a first clamping plate and a second clamping plate. One side of the first clamping plate and one side of the second clamping plate are provided with clamping arcs which are semicircular and can be matched with each other to form a circle. The locking clampingrod is provided with a connecting rod in an inclined hinged manner, and an end part of the connecting rod is hinged to a handle. The centers of the clamping arcs are respectively provide with movableclamping blocks, and the two movable clamping blocks are respectively provided with movable push frames. The interior of each movable push frame is provided with a threaded push rod in a sleeved manner, and one end of each threaded push rod is disposed on the corresponding movable clamping block. According to the invention, the device is provided with the first and second clamping plates which are matched with each other,