The utility model provides a tongue of a freight full trailer and a freight full trailer with the tongue. The tongue comprises a tongue weldment, and a tow shackle seat and a tow shackle fixed with the tongue weldment. The utility model is characterized in that the tongue additionally comprises a telescopic rod, which is adjustably connected with the tow shackle seat; the tow shackle is movably connected with the front end of the telescopic rod. The utility model allows adjusting the length of the tongue as applicable without re-making a tongue, ensures safe steering of the freight full trailer, saves time and cost, and improves the transportation fitness of the freight full trailer.