Electric corrosion preventing bearing

The invention discloses an electric corrosion preventing bearing, and relates to a bearing. Electric corrosion is easily produced due to potential difference between an inner ring and an outer ring of a rotating bearing, so the current flowing surface of the bearing is concavo-convex, and the service life of the bearing is shortened. The electric corrosion preventing bearing comprises an inner ring, an outer ring and a rolling body positioned between the inner ring and the outer ring. The electric corrosion preventing bearing is characterized in that: a conductive electric ring is arranged between the outer ring and the inner ring, the elastic ring is contacted with the outer ring and the inner ring, and the bearing is provided with a limiting part for positioning the elastic ring. The elastic ring keeps a contact state with the outer ring and the inner ring by means of elasticity; the bearing has simple structure and is easy to manufacture, so the bearing has low cost and is suitable for large-batch production; and the bearing has good reliability, and the voltage difference between the inner ring and the outer ring of the bearing is reduced to zero so that the service life of the bearing is prolonged.