The invention discloses a cable protection knuckle sleeve pipe comprising a upper piping member and a lower piping member which fit together to form a hollow pipe for arranging optical cable or electric cable, each of the upper piping member and the lower piping member includes a front hollow cuff, a middle pipe fitting and a rear hollow cuff, a joining device is arranged on the front hollow cuff to join the upper piping member and the lower piping member, and at the same time to wrap the rear hollow cuff of the last section of the protection device into the front hollow cuff, thus forming a connection similar to the human knuckle that can be interlinked to form a pipe for realizing the flexible rotation at local positions. |