[en] A new design to obtain longitudinal polarization of particles in the collider VEPP-4 by means of a superconducting solenoid turning the spin around velocity about the angle of π (''Sibirian coil winder'' of the first type) has been calculated. The problem was solved to compensate the perturbation introduced by a solenoid in orbital motion. The analysis of radiation kinetics of the spin proves that the time of depolarization in the region of 2 GeV may amount to several hours. We discuss a method for injecting the polarized beam from a booster collider VEPP-3 to the collider VEPP-4. (orig.)