The Surkhandarya oasis of the southern region of the Republic of Uzbekistan, the fauna of nematodes found in the peanut root and soil around the root was studied, as well as their population density and their effect on plants were scientifically analyzed. As a result of the carried out phytohelminthological studies in peaunt plant in the southern region of Uzbekistan, we found 136 species of phytonematodes belonging to 55 genera, 38 subfamilies of 34 families, 22 superfamilies, 13 suborders, 9 orders and 2 subclasses.