  We analyse the calculations of deep inelastic structure functions of free
nucleons by QCD sum rules method,carried out by others.We present our results
of calculation of the distribution of valence quarks in nucleon placed into the
nuclear matter.We show that the change in distribution has typical EMC shape.We
discuss possible application of the method to investiga- tion of other aspects
of deep-inelastic processes.We analyse also the limits of possibilities of the
approach.
