Abstract: The sintered non-evaporable getter (NEG) pump HV400 has a high affinity for hydrogen and hydrogen isotopes, and the getter material can operate at room temperature. In order to pump under the working conditions of EAST Tokamak neutral beam injector, then the HV400 was studied. The Molflow software was used to analyze the pressure distribution and extraction performance under different intake amounts at working temperature. The linear relationship between the system equilibrium pressure and intake volume and the curve of pumping speed changing with the equilibrium pressure were obtained. It was found that the pumping speed of the three gases fluctuated slightly but not significantly at 10⁻³~10⁻² Pa, indicating that the performance of HV400 on H₂, CO₂ and N₂ pumping speed is basically stable. Compared with the actual pumping speed, the error of the evaluation results are 1.95%、3.13% and 2.09% respectively, which meets the requirements of the test system and shows the design of system are feasible. Based on the pumping speed test principle of standardized flow-meter method, a pumping speed test system was designed and the test was carried out. The experiment results and simulation have verified the feasibility of the system design, and the best hydrogen extraction effect is at the level of 10⁻³ Pa, which provides theoretical basis and technical support for the design of vacuum system for NBI.