The highly ionized Argon spectrum in the vacuum ultraviolet region from 2000? to 194? is reported. A lot of new spectral lines are observed. Among them, 64 new spectral lines are identified, the new energy levels are found as follows: ArIV 3s23p2(3P)3d2F5/2,7/2, ArIV 3s23p2(1D)3d2S1/2, ArV3s23p3d1D2 and ArVI3p32)P1/2,3/2. Nine energy level values of ArIV3s23p2(3P)3d2P1/2,3/2,ArIV3s23p2(1D)3d2P1/2,3/2,ArIV 3s23p2(1D)3d2D3/2,5/2,ArIV 3s23p2(1D)4s2D3/2,5/2 and ArV 3s23p3d1P1 are revised.