Cross arm

The utility model discloses a cross arm which comprises a bulb tube stand column, and the bulb tube stand column is used for supporting the cross arm. The cross arm body is arranged on the outer side of the right part of the bulb tube stand column; the cross arm body comprises an outer arm body, and the inner side surface of the outer arm body is connected with an inner arm body; the sliding grooves are formed in the two sides of the exterior of the outer arm body; and the tightening bolt is arranged on the outer side surface of the outer arm body. After the outer arm body and the inner arm body of the cross arm are fixed, a hollow channel is formed on the inner side, and after the X-ray camera and the cross arm body are fixed, a cable externally connected with the X-ray camera can extend into the hollow channel on the inner sides of the outer arm body and the inner arm body through the through hole in the middle end of the access seat and the wiring port. Therefore, the cross arm body can protect the cable o