[en] In this paper, the forms of the gluon distribution function at different Q² are discussed with the aid of the three quark model and the dynamical calculations of QCD (the leading logarithm approximation). The Buras-Gaemers parametrization is improved and the gluon distribution function obtained can be parametrized by the simple parameter form xG(x,Q²) = xG₁(x,Q²) +xG₂(x,Q²) = [1+B(s)]< xG₁(Q²)>₂ (1-x)/sup /(s)] +[1+D(s)] < xG(x,Q²)>(1-x)/sup D/(s). The form satisfies the QCD evolution equation and does not contradict evidently the existing experimental data. The properties of the gluon content in a nucleon are analyzed on this basis. The result indicates that the gluon distribution function can be considered as consisting of two different parts: a soft component and a hard component