  We present first results of the X-ray spectral analysis of the 500 ksec deep
survey obtained with XMM-Newton on the Chandra Deep Field South (CDFS).
Statistical distributions of spectral index and intrinsic absorption are
derived for a sample containing 70 sources with a count limit of 100 (flux
limit in the [2-10] keV band of 8.9 $\times 10^{-16}$ erg cm$^{-2}$ s$^{-1}$),
of which 44 have redshift identification. We observe a separation between the
type-1 and the type-2 AGN in diagnostics involving different X-ray parameters.
Using the subsample with known $z$, we show that this separation between the
AGN populations is a consequence of different absorption column densities. The
two populations have the same average spectral index, $<\Gamma> = 2 \pm 0.1$.
  We present integrated spectrum for the most distant type-2 QSO whith strong
X-ray absorption and a clear soft excess; we obtained the best fit for these
objects with two difference models: a scattering model and a double power law
model. We also confirm a progressive hardening for the combined integrated
spectra for faint objects which at first was noted by \cite{toz01a}. Our
results shown a clear evolution of decrease of $<\Gamma>$ with decreasing flux
in the hard 2-10 keV band. However, we detect not only a regular increase of
$<\Gamma>$ for different subsamples of fluxes in comparison with Chandra
results, but also an internal discrepancy of the values, if we fitted in the
different energy bands.
