The utility model provides an use reliable submarine cable protection tube, including a pipe body, locate front end articulated joint and rear end articulated joint that the interior cable of body wasplaced the chamber and was located the body both ends respectively, the connection that the rear end articulated joint of another body in realize two bodys is located through the front end articulated joint with a body, and the cable of two bodys is placed the chamber and is communicated with each other, the front end articulated joint is rotated with the rear end articulated joint and is connected, make and to be certain angle between two adjacent bodys, make the cable trend change, thereby avoid debris such as gravel, also can set up the trend of cable according to submarine topography's trend, make the use of submarine cable protection tube safer, reliabl. The tip of rear end articulated joint is equipped with the inclined plane, and when extreme position was rotated in the front end articulated joint, the surface of inclined plane and body was tangent, when the tip and the body of rear end articulated joint contact, and surface that the tip of rear end articulated joint can not the fish tail body for the use of submarine cable protection tube is more reliable.