Abstract: The X-ray diffraction patterns of amorphous alloy Fe₈₀B₂₀ before and after cold rolling deformation have been compared. The first peak of the diffraction pattern shift slightly to a smaller angle and the width of the peak slightly increases after cold rolling.The increase of the width of this peak should be the due result of the increase of the short-range disorder of this alloy. A computer program of determination of the RDF of amorphous material was worked out by the authors and the RDF curves of amorphous alloy Fe₈₀B₂₀ before and after cold rolling were determined.Within the precision allowed in our experiment no change of RDF of this allloy before and after cold rolling has been observed.