Rubber spring vibration isolator, roadbed slab and roadbed

According to the rubber spring vibration isolator, the roadbed slab and the roadbed, rigid connection between the roadbed and the base structure can be isolated through the multiple rubber springs, impact energy of a train is absorbed, and vibration and noise reduction of a track is achieved. Particularly, the elastic element comprises a rubber spring, an upper cover, a lower cover, two limiting rings and a supporting cover, the two ends of the rubber spring are embedded in the upper cover and the lower cover respectively and are pressed through the two limiting rings respectively, the supporting cover wraps the outer sides of the upper cover and the lower cover and is fixedly connected with the upper cover, and therefore the two ends of the rubber spring are embedded and pressed tightly, and the elastic element is fixedly connected with the upper cover. And the supporting cover, the upper cover and the lower cover further form a structure for transversely limiting the rubber spring, so that the degree of fre