The invention discloses lifetime ground test equipment for an ion thruster. By employing the equipment, special requirements of high pumping ability, small return sputtering sediment, high reliability, and high equipment integration of test equipment for lifetime tests of the ion thruster can be satisfied. The lifetime ground test equipment for the ion thruster comprises a main cabin vacuum container, a gate valve, an auxiliary cabin vacuum container, a vacuum pumping system, an ion beam target, an anti-sputtering screen, a thruster mobile mechanism, a quartz crystal microbalance QCM, a thruster divergence angle measuring system, a grid corrosion on-line monitoring system, a ground test power supply system, an equipment control system, a xenon supply system, a repressing system, a cooling water system, a pneumatic element air supply system, a liquid nitrogen storage and supply system, and a shooting illumination system. By employing the equipment, real results of the lifetime of the ion thruster can be obtained, and real and reliable test data can be provided for the evaluation of the lifetime and the reliability of the thruster.