Walk positioning device of displacement sensor

The utility model discloses a walk positioning device of a displacement sensor and the device comprises a walk trolley, a fixing device of the walk trolley, a slide rail and an induction coil. The walk positioning device further comprises a bar-shaped displacement sensor and fixed plates, wherein the fixed plates are respectively fixed on a front and back ends of the walk trolley; a lower end of the trolley is provided with a through hole; and the bar-shaped displacement sensor passes through the through hole and the induction coil and is held up by the through hole. During a steel rolling process, the bar-shaped displacement sensor shakes with the induction coil and maintains an unchanged relative position to the induction coil, thereby making position information of boards detected by the bar-shaped displacement sensor more precise and improving width precision of the boards.