The invention discloses a chip ultra-low temperature cooling device and a
chip testing
system, and relates to the technical field of
chip testing, the chip ultra-low temperature cooling device comprises a
liquid nitrogen pump which is configured to be started according to a control instruction of a control module so as to inject
liquid nitrogen of a
liquid nitrogen tank into a first Dewar through a first liquid conveying
pipe; one end of the first infusion tube is arranged at an outlet of the liquid
nitrogen pump, and the other end extends into the first Dewar; the first Dewar is communicated with the second Dewar through a second infusion tube; the second Dewar is not sealed and is communicated with the first Dewar through a second liquid conveying
pipe, and a chip bearing table is arranged in the second Dewar and is used for bearing a chip to be tested; and the control module is configured to send a control instruction to the liquid
nitrogen pump according to user requirements or based on the received temperature
signal or liquid level
signal, so as to control the start and stop of the liquid
nitrogen pump. According to the chip testing
system, automatic filling of liquid nitrogen and almost constant liquid level height in the chip testing process can be achieved, and the accuracy of chip testing data is guaranteed.