The analysis of the amplitude and waveform of the registration conditions - "nonlinear EPR spectroscopy" for information about the molecular structure of peat bitumen is proposed to use. It has been shown that their paramagnetism is not explained by HA impurity or by semiquinone radicals, and obliged to synergies interaction of single aromatic rings and hydrogen which are formed by functional groups - "quasi polyconjugation" system, which explains the variability of the parameters of the EPR signal of bitumen in contrast to the HA with the real molecular systems of polyconjugation. The spin probe method showed the important role of the low content of individual aromatic moieties in the formation of supramolecular structure of bitumen.