Heat exchange device, Stirling cryocooler and refrigerating system

The invention provides a heat exchange device, a Stirling cryocooler and a refrigeration system, relates to the technical field of refrigeration, and solves the technical problems that the refrigeration capacity is low due to microscopic deformation during implementation of a solid refrigerant, and the large-refrigeration-capacity refrigeration requirement cannot be met. The solid refrigerant heat exchange device comprises a cylinder body, an elastic body, a heat exchange pipe and a heat exchange driving mechanism, wherein a first end and a second end which are isolated from each other are arranged in the cylinder body; the heat exchange tube is arranged in the cylinder body in a penetrating manner; fluid medium heat exchange channels communicated with the heat exchange tubes are respectively arranged in the first end and the second end; the elastic body is arranged in the heat exchange tube so as to absorb heat or release heat at the first end or the second end when the elastic body is stretched or compresse