The invention provides an artificial upper limb arm tube which comprises an upper arm tube body (1) and a lower arm tube body (2). The artificial upper limb arm tube is characterized in that through the match between a stepped outer circle (3-1) of a cylindrical metal insert (3) of the upper arm tube body (1) and a cylindrical stepped round hole (2-2) of the lower arm tube body (2), and through a locking mechanism in the middle, the upper arm tube body (1) and the lower arm tube body (2) are connected into a whole, and the upper arm tube body (1) and the lower arm tube body (2) can carry out 360-degree circular motion relative to each other. According to the artificial upper limb arm tube, the upper arm tube body and the lower arm tube body are formed through injection molding, in the aspect of appearance, the artificial upper limb arm tube achieves the effect of the simulation human arm, and the production efficiency is also greatly improved; the stepped outer circle of the upper arm tube body with the metal insert is matched with the cylindrical stepped round hole of the lower arm tube body, and further through the intermediate locking mechanism, the upper arm tube body and the lower arm tube body are connected into a whole, and thus the upper arm tube body and the lower arm tube body can carry out 360-degree circular motion relative to each other.