Bleaching process is a critical stage in refining of vegetable oils. The used bleaching clay adsorbes metals, phosphatides, dye and soap in vegetable oils. The effect of nanoclay particles on practical properties of vegetable oils bleaching was investigated. For this aim the particles of nanoclay and its bleaching form have been used. Nanoparticles of the natural montmorillonite, modified quaternary ammonium salt and immodified montmorillonite have been added  to bleaching clay and their effect has been investigated at bleaching soy-bean oil. The result showed, that the obtained mixture decreases amount of phosphatides in naturalized soy-bean oil greatly.