[en] By the method of a single-time reduction of the Bethe-Salpeter formalism for two-fermion system, analytical expressions for the potentials of quark-quark and quark-antiquark interactions in QCD have been obtained in one-gluon exchange approximation. The asymptotic properties of quark-quark forces in configuration space have been studied. The dynamic equation for the wave function of meson as a quark-antiquark bound state has been derived in one-gluon exchange approximation. 18 refs