Potato production area and total yield in Inner Mongolia ranks front in China，but its per
unit area yield is below the average national level．Unreasonable nutrients management is an important factor
restricting potato yield．In order to find out the problems existing in irrigated potato nutrient inputs，this paper
conducted peasant household investigation in 9 main potato producing counties during 2013-2016 in Inner
Mongolia．The results indicated that the input of nitrogen fertilizer was exorbitant，and over-input or shortage
of phosphorus and potassium fertilizer were coexistent．Nitrogen partial factor productivity of 57.3% peasant
households was lower than 100 kg · kg^-1 for irrigated potato production in Inner Mongolia，having bigger room
for improvement．There existed remarkable correlativity between planting scale of peasant households，yield
level of potato，nitrogen fertilizer application amount，and nitrogen partial factor productivity．