Telescopic blade for high-speed clearing, consisting of a fixed body with a monolithic structure and two telescopic extensible elements that, depending on the versions, respectively lengthen one on the left side and one on the right side, allowing to vary the working width in function of the different types of road routes. This allows working both in the closed and elongated position and in all the intermediate positions. It is equipped with hydraulic adjustments that allow the right-left rotation, the lowering and the movement of the extensible elements. Suitable for clearing on motorways and airports.