The invention relates to an ionic conductor elastomer and preparation and application thereof. The ionic conductor elastomer is prepared by taking a high molecular monomer, a water-soluble polymer andan ionic liquid as raw materials, carrying out one-step water phase free radical polymerization under the action of an initiator, and processing. The ionic conductor elastomer prepared by the invention has high strength, self-repair, ultra-long stretching and other high performance, and is easy to be processed into various shapes. The ionic conductor elastomer has simple steps and easy operation,is convenient to realize large-scale production and preparation, and is expected to be used in the fields of Internet of Things sensing equipment, medical bionic electronic instruments, intelligent robots and the like.