The utility model relates to a supporting legs. Fiber reinforcement type overhauls multi-functional supporting legs of platform, its characterized in that include universal wheel, lead screw, the omnipotent joint in bottom, connecting rod, the omnipotent joint in top, studdle, top bush, bracing piece, bottom bush, the upper end of universal wheel is fixed with the lead screw, is equipped with the screw thread through-hole that is used for with lead screw threaded connection in the bush of bottom, and the bottom bush revolves on the lead screw through its screw thread through-hole, the through-hole of the omnipotent joint in top is passed to studdle's upper end, and the upper end close-fitting of connecting rod is in the jack of connecting rod upper end, the top bush revolves on studdle through its screw through-hole, is equipped with the 2nd studdle hole in the bracing piece, during the 2nd studdle hole of bracing piece is inserted on the upper portion of top bush, inserts in the 2nd studdle hole of bracing piece after the screw through-hole in the bush of top is passed to studdle's upper end. Height-adjustable festival, the controllability of this multi-functional supporting legs are good, stability is good.