Hitching auxiliary device used for full trailer traction rod

The invention provides a hitching auxiliary device used for a full trailer traction rod. The hitching auxiliary device comprises a shell; the shell is a water-drop-shaped flat board, a fixed frictiondisc is rotationally fixed to the lower portion of the shell, the left side and the right side of the fixed friction disc are fixed to the lower ends of a damper and an extension spring, and the upperends of the damper and the extension spring are fixed to the positions, near the top end, of the shell; and a friction force adjuster is fixed to the bottom of the shell and is in frictional contactwith the fixed friction disc. The functions that the large-mass traction rod can be easily rotated by manpower, stopped in any position and prevented from instantaneously rotating and crashing down can be achieved, and the problems that a traction rod is difficult to rotate, and the hitching height is inconvenient to adjust are solved; specifically, the dead weight of the traction rod can be counteracted, and the large-mass