Heat treatment technology for spring used for bearing

The invention discloses a heat treatment technology for a spring used for a bearing. The heat treatment technology includes the following steps that firstly, annealing treatment is conducted; secondly, oil cooling is conducted; thirdly, tempering treatment is conducted; and fourthly, air cooling is conducted. The heat treatment technology for the spring used for the bearing is easy to operate and achieve, through the reasonable design for the annealing and tempering temperature and a cooling treatment technology adopted after annealing and tempering, the treated spring is high in strength and good in toughness and elasticity, the elasticity durability of the spring is relatively high, the service life of the spring is prolonged, and the service life of the bearing provided with the spring is prolonged.