  PROZA-M experiment results as well the proposal of a new spin program with
the use of a polarized proton beam are presented. Significant asymmetries were
observed in inclusive $\pi^0$ production. The new program proposes to study a
wealth of single- and double-spin observables in various reactions using
longitudinally and transversely polarized proton beams at U70. The main goal is
to define gluon contribution to nucleon spin by measuring double-spin asymmetry
in charmonium production.
