The invention relates to a flexible supporting leg used in walking mechanics and relative concrete pump, which comprises a supporting box connecting the base and rotating the rotational axle; a sheath tube extending inside the supporting box; and a supporting leg sheathing on the front end of sheath tube and vertically extending. Wherein, said supporting box and sheath tube have a hydraulic cylinder with bidirectional function; two ends of said hydraulic cylinder are individually mounted on the fixing point at the end of supporting box and the farthest fixing point of sheath tube; and the rotational axle is between two ends of supporting box and de-center from the extension axle of hydraulic cylinder. The concrete pump can use said flexible supporting leg. The invention has tight structure, better forcing property, and shorter distance from the supporting leg rotational axle to the rotational device. And the concrete pump can better stability and wider application. |