  Infinite-temperature long-time dynamics of Heisenberg model
${\bf\hat{H}}=-\frac{1}{2}\sum_{i,j}J_{ij} \hat{\vec{S}}_{i}\hat{\vec{S}}_{j}$
is investigated. It is shown that the quantum spin pair-correlator is equal to
the correlator of classically evaluated vector field averaged over the initial
conditions with respect to the gaussian measure. In the continious limit case
the scaling estimations allow one to find one-point correlator that turns out
to be $C(\vec{r}=0;t)\propto const \times t^{-6/7}$. All results are obtained
by straightforward procedure without any assumptions of the phenomenological
character.
