Cold end heat exchanging device and semiconductor refrigerator

A cold end heat exchanging device (200) and a semiconductor refrigerator having the cold end heat exchanging device (200). The cold end heat exchanging device (200) comprises a cold end heat exchanging part (10) and a plurality of refrigeration agent pipelines (20). The cold end heat exchanging part (10) is used for limiting an inner cavity or a pipeline for containing a gas-phase and liquid-phase co-existing refrigeration agent. Each refrigeration agent pipeline (20) is provided with an evaporation section (21) that is downwards bent and extends in a vertical plane and has a sealed tail end, and a connection section (22) that is upwards bent and extends from a starting end of the evaporation section (21) and is communicated with the inner cavity or the pipeline. Evaporation sections (21) of at least some refrigeration agent pipelines (20) of the plurality of refrigeration agent pipelines (20) are distributed in two vertical planes that are perpendicular to each other. Because at least some evaporation sections (21) are distributed in the planes that are perpendicular to each other, at least one side wall and a rear wall of a liner can perform heat exchange with the evaporation sections, so that the cold radiation efficiency of the cold end heat exchanging device (200) and the energy efficiency of the semiconductor refrigerator are improved.