The utility model discloses a splayed telescopic leg and mobile concrete pump, wherein splayed telescopic leg includes fixed leg (1) and removes landing leg (2), fixed leg (1) is formed with spout (11) so that removal landing leg (2) slides in spout (11), be equipped with lubricating arrangement between the inner wall of removal landing leg (2) and spout (11), can reduce the frictional force of landing leg when contracting and expand to reduce the abnormal sound, improve the life of landing leg.