An adjustable ejector with a spindle in the nozzle was developed for a wider adjustment rangeAn experimental study was carried out on the performance of the adjustable ejectorTo change the spindle position axially the nozzle throat sectional area could be changedThe ejector flow parameters，such as flow rate，pressure and entrainment ratio，at different spindle positions were measuredThe results showed that the adjustable ejector could be used in a wider range of fluid flow rateWhen the throat area was reduced，the ultimate discharge pressure would be lower but the entrainment ratio would increase greatly.