Focusing lens

The utility model discloses a focusing lens comprising a lens barrel, a pedestal and a spring; wherein the pedestal is cylindric, the lens barrel is in threaded connection with the pedestal; the spring is sleeved at a position where the lens barrel is in threaded connection with the pedestal; and one end of the spring is fixed on the pedestal, the other end of the spring is fixed on the lens barrel. By adopting the technical scheme of the focusing lens of the utility model, relative displacements between parts of the lens and between the lens barrel and the pedestal caused by shock and temperature changes can be effectively reduced, thereby overcoming the problem of out-of-focus after a camera is used for some time.