Abstract: The closed cycle cryogenic system with GM cryocooler or pulse tube cryocooler as the cold source has gradually become the mainstream equipment in laboratory for obvious advantages in saving resources, reducing operating costs, reducing system complexity, and improving system operability. The development and testing of a laboratory grade 1.8 K miniature cryogenic system without liquid helium are introduced. Using a GM refrigerator as the cooling source, a vacuum pump as the circulating power, and high-purity helium gas as the refrigerant to achieve flow cooling of the sample, an ultra-low temperature of 1.8 K is achieved through techniques such as throttling cooling and vacuum pressure reduction. By using precise heating and temperature control technology, the sample can be tested continuously in a wide temperature range of 1.8-300 K. After the assembly and integration of the 1.8 K dry cryogenic system without liquid helium, its various cryogenic performances are tested. The experimental results show that the system takes 159 min to cool down from room temperature to 1.8 K, and can achieve a minimum temperature of 1.665 K. In the temperature control test at 12 temperature points, the temperature stability is within ±5 mK. The secondary cooling time of the sample chamber is about 52 minutes to 4.2 K and 87 minutes to 1.8 K. This system has the characteristics of fast cooling speed, timely temperature response, high temperature control accuracy, low measurement uncertainty, and simple operation, which can provide a good user experience for laboratory cryogenic testing. In the future, efforts will be made to carry out research and experimental work on the minimum temperature of the system being less than 1.5 K, seismic isolation and reduction in the core area, coupling of sample space with multiple environments such as magnetic fields and optics, etc., to provide better service guarantees for cryogenic testing research in various fields.