Carbon capture and storage receives extensive concern in the background of global warming. Because of the huge costs and complex processes of traditional carbon capture technology in industrial applications, a novel carbon capture technology by cryogenic desublimation,which can be used for industrial cold recovery,has been studied in this article. Since the existing cryogenic carbon dioxide desublimation data is insufficient,a low temperature visualized experiment platform was setup to test and record temperature distributions and crystalline morphology in the heat exchanger for N_2 /CO_2 binary system in different concentrations and flow rates. And different carbon dioxide desublimation states are recorded.