Abstract: Based on the analysis of the working requirement of the 10 cm Hall thruster, by using the orifice throttling theory and the properties of the xenon viscosity that can significantly change with the temperature, and with the powder metallurgy porous material as a throttle element, the propellant micro-flow-rate adjustment is realized. The flow controller based on this control technology is designed, and the environment tests are carried out. The flow performances of the flow controller are tested on the propellant flow testing systems before and after the environment tests, and the observed results are consistent very well with each other and satisfy the design requirements. The flow controller can achieve the real-time adjustment in a wide range of temperature, its functions can meet the flow demands of different products under different working conditions, and it also has a good adaptability and adjustable performance.