The kinetics and mechanism of catalytic redoxing for the natural polyphenols, e.g. catehine (+) containing molecular oxygen, hydrogen peroxide and ions of Fe(III) in the systems: Fe(II) - oxygen - (+)-catehine; Fe(II) - (+) catehinehydrogen peroxide; Fe(II) - (+) catehine. The kinetic equations were introduced and the effective speed constants were determined. The mechanisms schemes in the given systems were done. By the inhibitors method it was proved that redoxing of (+) catehine in the Fe(II) - hydrogen peroxide - catehine (+) system is carried out by OH radicals. In the system a redox restoring cycle Fe(II) ↔ Fe(III) is formed, in which (+) catehine is playing the part of a reducing agent.