  The decays $\chi_{b0,2}\to\psi\psi$ and
$\chi_{b0,2}\to\psi\psi\to2(\mu^+\mu^-)$ are considered. It is shown that with
the help of $\psi$-meson angular distributions and the distributions by final
muon kinematical variables it is possible to determine the spin of the decaying
$\chi_b$-meson. These distributions can also give an additional information
about $\psi$-meson wave functions.
