The invention discloses a steel pipe pole climbable cross arm which comprises a cross arm body. A base plate and reinforcing ribs are arranged at one end of the cross arm body, armrests, pedals and a line hanging plate are arranged on the cross arm body, the armrests are arranged at the upper portion of the cross arm body, the pedals are arranged on two sides of the cross arm body, and the line hanging plate is arranged at the end, away from the reinforcing ribs, of the cross arm body. The pedals and the armrests are arranged on the cross arm body to facilitate that a worker can smoothly complete line hanging work on the cross arm during aerial operation by means of the pedals and armrests.