  Recent results of the spectral and timing analysis of X-ray pulsars in hard
X-rays with the INTEGRAL observatory are reviewed. The evolution of the
cyclotron line energy with the source luminosity was studied in detail for the
first time for several sources. It was shown that for V0332+53 this dependence
is linear, but for 4U0115+63 and A0535+262 it is more complicated. There are
some evidences of the "reverse" evolution for GX301-2 and Her X-1, and no
evolution was found for Vela X-1, Cen X-3, etc. A strong dependence of the
pulse fraction on the energy and source luminosity was revealed and studied in
detail. A prominent feature in the pulse fraction dependence on the energy was
discovered near the cyclotron frequency for several bright sources. The
obtained results are compared with results of observations in standard X-rays
and briefly discussed in terms of current models; some preliminary explanations
are proposed.
