[en] A formula to describe an average hadron multiplicity < n> on deep-inelastic processes has been proposed. On the basis of available experimental data predictions are made about the behaviour of average multiplicity at higher energies. The W-dependence of < n> obserVed in experiments at present remains invariable up to energies W approximately 20-25 GeV. At W> or approXimately 25 GeV there will begin a rapid ibcrease of < n>, which is analogous to the increase, observed for < n> sub(esup(+)esup(-)) and is of the same nature