Abstract:To establish index of fertilizer recommendation for Spring wheat in Hetao Irrigated Area, a total of 141 fertilizer trials designed as “3414” were carried out on irrigated Spring wheat based on soil fertility in Hetao irrigated area. The results showed that agronomy efficiency of N, P2O5 and K2O on Spring wheat in Hetao irrigation area was 64, 60 and 54 kg/kg respectively. Contrbution of N, P2O5 and K2O to Spring wheat yield was 252%-409% with mean of 335%, 159%-211% with mean of 184%, and 72%-90% with mean of 80% respectively, with yield increasing effect of N>P2O5 >K2O. Yeild response by fertilizer application increased with the declining of soil fertility, while agronomic efficiency decreased. The indices of sufficiency and deficiency of soil nutrients in Hetao irrigation area were built according to the relation of soil nutrient and relative yield. Total N was divided into five levels: lower(<063 g/kg), low(063-085 g/kg), medium (085-115 g/kg), high(115-156 g/kg), higher(>156 g/kg). OlsenP into: lower (<59 mg/kg), low(59-118 mg/kg), medium(118-238 mg/kg), high(238-480 mg/kg), higher(>480 mg/kg). Available K: lower(<906 mg/kg), low(906-1291 mg/kg), medium(1291-184 mg/kg), high(184-262 mg/kg), higher(>262 mg/kg). Fertilizer N, P and K recommendation models for Spring wheat in Hetao irrigated area were established according to the relationship of optimal application of N, P2O5 and K2O and soil nutrients. Index of fertilizer recommendation for Spring wheat in Inner Mongolia Hetao irrigated area was constructed primarily.