The embodiment of the invention provides a floating slab track vibration isolator and relates to the technical field of track vibration reduction. The floating slab track vibration isolator comprises a plurality of vibration isolation units; each vibration isolation unit comprises a vibrator ring, an elastic ring and an elastic supporting assembly, wherein the elastic ring is sleeved with the vibrator ring, and the elastic supporting assembly is sleeved with the elastic ring; and the multiple vibration isolation units are sequentially connected through the elastic supporting assemblies. The floating slab track vibration isolator provided by the invention has the characteristics of being better in vibration reduction effect, longer in service life, fewer in maintenance workload and more superior in comprehensive performance.