Thermally-driven low temperature refrigerating machine

The invention relates to the technical field of refrigerating equipment, and discloses a thermally-driven low temperature refrigerating machine. The thermally-driven low temperature refrigerating machine comprises a Stirling engine, a Stirling refrigerator and a harmonic oscillator, wherein the Stirling engine and the Stirling refrigerator are relatively arranged up and down, a cylinder, which is communicated with the Stirling engine and the Stirling refrigerator , is arranged between Stirling engine and the Stirling refrigerator, the harmonic oscillator is communicated with the cylinder and is arranged in the cylinder in a contraposition way. The thermally-driven low temperature refrigerating machine provided by the invention is low in vibration, and the system efficiency can be improved at the same time.