A semiconductor refrigerator comprises a liner (100), at least one semiconductor refrigerating sheet and a plurality of cold-end heat exchanging devices (200). Each cold-end heat exchanging device (200) is configured to allow a refrigerant to flow and perform phase-change heat exchange in the cold-end heat exchanging device (200), so as to transfer cold at a cold end of the at least one semiconductor refrigerating sheet to a storage chamber of the liner (100). Each cold-end heat exchanging device (200) is provided with three refrigerant pipelines (20), each refrigerant pipeline (20) is provided with an evaporating segment (21) with a closed end that is bent and extended downwards in a vertical plane, and evaporating segments (21) of the three refrigerant pipelines (20) of each cold-end heat exchanging device (200) are respectively connected to a rear wall and two side walls of the liner (100) in a thermal manner. Because the plurality of cold-end heat exchanging devices (200) is provided, an effective heat exchange area of a thermal connection to the liner (100) of the refrigerator is enlarged significantly, and therefore energy efficiency of the semiconductor refrigerator is improved significantly.