The utility model relates to a thermal stress compensator performance test experiment device which is characterized in that the device comprises an experiment bench, and one side of the experiment bench is provided with a hydraulic cylinder; the supporting device is arranged at the top of the experiment table frame in a sliding mode and used for supporting the thermal stress compensator, the outerside of the thermal stress compensator is sleeved with a heating ring, one end of the thermal stress compensator is fixedly connected with the output end of the hydraulic cylinder or the first sealing plug, and the other end of the thermal stress compensator is fixedly connected with the other side of the experiment table frame or the second sealing plug; the temperature sensor is arranged in theheating ring; the temperature control cabinet is electrically connected with the heating ring; the hydraulic station is provided with a first pressure sensor; the high-pressure pump set is connectedwith the first sealing plug or the second sealing plug, and a second pressure sensor is arranged on the high-pressure pump set; the thickened oil thermal recovery monitoring system can be applied to the field of thickened oil thermal recovery processes.