Abstract: A regenerative device based on solid-state elastocaloric refrigeration and heating, and a refrigeration and heating device are disclosed. The regenerative device includes a fixing mechanism, solid-state elastocaloric refrigeration/heating materials each provided with a perforation and arranged in sequence in the fixing mechanism, a driving mechanism, and a sleeve. The fixing mechanism and the driving mechanism are arranged in the sleeve. The driving mechanism includes a movable pressure head provided with a through hole. The movable pressure head extends into the fixing mechanism to apply stress to or remove stress from the solid-state elastocaloric refrigeration/heating materials. The perforations on the solid-state elastocaloric refrigeration/heating materials are aligned to form a channel. The channel is in fluid communication with the through hole to allow a heat-transfer fluid to perform heat exchange with heat generated by the solid-state elastocaloric refrigeration/heating materials.