The results of research concerning adjustable axial compressor stage with Inlet Variable Guide Vanes, working with constant rotation speed, are presented. The following should be mentioned, that all compressor unit designed with only one variable stator blades - IVGV. Special attention is paid to increase the efficiency and stall margin of the stage on a part loads (with closed IVGV). The results of computational investigation concerning adjustable axial compressor stage with Inlet Variable Guide Vanes (IVGV), working with constant rotation speed, are presented. Flow parameters in adjustable inlet compressor stage are studied on several regimes.