The article provides information on the ecological and cenotic analysis of pteridophyta in the north-eastern part of the Lesser Caucasus. It was found that most of the pteridophyta of the north-eastern part of the Lesser Caucasus have ecological plasticity, they spread in different ecotopes and found in the forest cenoses, as well as in the rocky cenoses. Ecological-senotic groups of the north-eastern part of the Lesser Caucasus have been studied by us. The article also analyses the ecological groups of pteridophyta and their light regimes.