The influence of refrigerant pressure on the refrigeration performance of a corrugated tube self-adjusting J-T cooler was studied through specific experiments. The conclusion of the experimental conditions is that within a certain pressure range (11 MPa≤P≤23 MPa), as the working fluid pressure increases, the start-up time of the infrared system using this refrigeration device gradually shortens, but the rate of accelerated startup will decrease with the increase of working fluid pressure. When the working fluid pressure increases to a certain extent (23 MPa≤P≤27 MPa), the startup time will tend to stabilize. Within a certain pressure range (11 MPa≤P≤15 MPa), as the working fluid pressure increases, the storage time of the infrared system using this type of cooler gradually increases. But when the working fluid pressure increases to a certain extent (15 MPa≤P≤27 MPa), the cold storage time will tend to stabilize. Within a certain pressure range (11 MPa≤P≤27 MPa), with the increase of working fluid pressure, the maximum flow rate of the refrigerator increases linearly during startup, and the stable flow rate gradually increases during operation. The process, methods, and research results of this experimental study have reference significance for engineering practice.