The X-ray emission spectra from highly stripped plasma of gold has been observed by focusing a Nd-glass frequency-tripled laser beam onto the surface of the gol d dot at the XINGGUANG Ⅱ laser facilities. The spectra of gold ions in the rang e of　0.0003nm—0.0004nm was recorded using the plate PET (2d=0.8742nm) crystal spectrometer. The code of average energy of relativistic subarrays was built on the basis of the code MCDF (Multi-Configuration-Dirac-Fock). Using the spin-orbi t-split-arrays (SOSA) formalism, mean wavelengths and full widths at half height of isolated peaks of subarrays of lower charged gold ions, isoelectronic with C u,Zn,Ga and Ge, was calculated. Twenty-six lines are interpreted, they pertain mainly to transitions of 3d-nf (n=5,6, 7) of gold ions from Ni-like to As-like. These results of experiment and calculation have important application in pla sma diagnostics and examination of high Z elemental atomic structure calculation .