Low-temperature safety valve testing device

The invention relates to a low-temperature safety valve test device. The device comprises a test container, a temperature control layer and a thermal insulation layer. The test container is used for accommodating a test medium; the test container is provided with a test medium inlet and a sample piece interface, the test medium inlet is used for inputting the test medium into the test container, the sample piece interface is connected with the interior of the test container, and the sample piece interface is used for connecting a tested safety valve; and the temperature control layer sleeves outside the test container, the heat preservation layer sleeves outside the temperature control layer, and the heat preservation layer is used for heat insulation and heat preservation of the temperature control layer. And a temperature control cavity is formed between the temperature control layer and the test container, the temperature control cavity is used for accommodating a temperature control medium, and the temper