The surface levelling of epigeosynclinal mountains is considered the fragments of abrasion planes formed at the level of common basis of erosion and deformed later on at various levels. The conception of these mountains, the mobile geotectonic systems of lithosfere, complexity the development peculiarities of morphostructures shows not a complete conformation of their peneplenizaton and transformation at common surface of penepen type. And this, in its therm, is considered as the factor providing the possibilities of incomplete destruction of surface levelling and thus preservation in relief their fragments of Mesozoic age. At the same time, development of morphostructures at the background of sharp differentiated tectonic movements shows the existence between age and height or surface levelling, against traditional accepted one-side correlation (age or surface levelling directly depends on their heights), on many-structured correlation (different age surface levelling are situated closely, same-aged at different levels, young one higher than ancients, etc.). In other hand, genetic adequateness of surface levelling and transgressive disagreement in stratigraphic sections forming the sediments, and space-time celations with each order allow to reveal a certain natural relations between them; surface levelling and disagreement of synchronic phenomena; indecies of transgressive and regressive conditions and abrasion of basin and so on. Hence, abrasion-stratigraphical conception is suggested in the solution of the problems of surface levilling of epigeosynclinal orogens, principle of geomorphological correlativity developing as methodological basis of relief studies.