High pressure gas bearing experiments have the characteristics of high pressure and large flow rate. However, most of the existing pressure adjustment methods for gas bearing experiments cannot be applied to high pressure and large flow conditions due to their low working pressure and small flow rate. In order to control the output pressure of the highpressure gas bearing intermittent gas source, a twostage selfoperating pressure regulating valve in series pressure regulation method was proposed. The relevant parameters of the selfoperating pressure regulating valve were determined through calculation and actual tests were performed. The results show that the twostage series valve group can quickly reduce the pressure behind the valve from 1.2 MPa to the set pressure within 4 seconds, and achieve rapid adjustment of the pressure. As the selfoperated pressure regulating valve widely used in the process industry is used as the main pressure regulating component, the construction cost of the highpressure gas bearing intermittent gas source system is significantly reduced, the output pressure stability is better, and the reliability ishigher.It provides a simple and effective solution for the pressure control of the intermittent experiment gas source system in small laboratories.